水中では、小川に沿った方向は下流と呼ばれます。そして、ストリームに対する方向は上流と呼ばれます。
まだ水の中のボートの速度がu km/hrであり、ストリームの速度がv km/hrの場合、次のとおりです。
速度下流=(u + v)km/hr。
速度上流=(u -v)km/hr。
ダウンストリームの速度がkm/hrで、上流の速度がb km/hrの場合、次のとおりです。
まだ水の速度= 1/2*(a + b)km/hr。
ストリームの速度= 1/2*(a -b)km/hr。
利益、p = sp - cp; sp> cp
損失、l = cp - sp; cp> sp
p%=(p/cp)x 100
l%=(l/cp)x 100
sp = {(100 + p%)/100} x cp
sp = {(100 - l%)/100} x cp
cp = {100/(100 + p%)} x sp
cp = {100/(100 - l%)} x sp
割引= MP - sp
sp = mp -discou
偽の重量の場合、利益率はp%=(真の重量 - 偽重量/偽重量)x 100になります。
2つの成功した利益がM%とN%と言う場合、純パーセンテージ利益は(M+N+Mn)/100に等しくなります
利益がM%で、損失がn%の場合、純%の利益または損失は次のとおりです。
製品がM%利益で販売され、その後再びn%利益で販売された場合、製品の実際のコスト価格はCP = [100 x 100 x p/(100+m)(100+n)]になります。損失の場合、 cp = [100 x 100 x p/(100-m)(100-n)]
p%とl%が等しい場合、p = lおよび%loss = p^2/100

チェックするには、数値に5または2を掛けるには、その数を追加するよりも(5倍の場合5)
EG: 532 Div by 7
ステップ1- mul 2x5 = 10ステップ2-ユニットの数字を無視し、左番号53 | 2+10 = 63に追加します
元の番号よりもはいの場合、分割可能な番号を確認します。
シミラリーに2を掛け、代わりに追加すると減算します。
ユニットの数字を5を掛け、数値よりもこの多数の場合、値を掛けた値にrest桁を掛けます。
例: 272 IV x 17
ステップ1-
MUL 2*5 = 10 **ステップ2- **
27-10 = 17 17は17で分裂しているため、272は17で分裂します。


クロックの顔またはダイヤルは、周囲が微小スペースという名前の60の等しい部分に分割される円です。
時間の手と瞬間の手、時計には両手があります。小さな手は時間の手または短い手と呼ばれ、大きい手は微細な手または長い手と呼ばれます。
60分で、1分の手で55分のスペースを獲得します。
(60分では、時間の手が5分間のスペースを移動し、1分の手は60分のスペースを移動します。実際、時間の手のスペースゲインは60〜5 = 55分になります。)
時計の両手は、1時間ごとに一度一致します。
時計の手は、互いに一致している、または互いに反対であるときに同じ直線にあります。
時計の両手が直角にあるとき、それらは15分のスペースです。
時計の手が反対方向にある場合、それらは30分のスペースです。
12時間で1時間の手でトレースされた角度= 360°
60分で1分間の手でトレースされた角度。 = 360° 。
theta(別名学位)= 30 x h-(11/2)xm
Reflax Angle = 360 -Theta




1。自然数(n)= 1、2、3 、。 。 。 。 2。総数(w)= 0、1、2、3 、。 。 。 。 3。INTEZERS (z)= −∞。 。 。 -2、-1、0、1、2、3 、。 。 。 4。有理数(q)=フォームP⁄Qの数がq≠0 。 5。非合理的な数字(i)=フォームx1⁄n≠intezerの数。また、πとEは、非終了で非回復的な数値でもあります。
他のタイプの数字: a。偶数:2で正確に割り切れる数字。これらの数値は2nの形式です。 b。奇数:残り1を2で割ると、残りを与える数字。これらの数値は2n±1の形式です。c。素数:1で割り切れ、数字自体が素数です。最小プライムは2です。d。複合数:その数は2つ以上の数字で割り切れます。
奇数±odd =偶数;
±偶数=偶数。
±odd =奇数
奇数×odd = odd;
ven×vet = ven;
偶数×奇数=偶数。
ODD(任意の数)= ODD
偶数(任意の数)=偶数
(a -b)2 =(a2 + b2-2ab)
(A + B)2 =(A2 + B2 + 2AB)
(a + b)(a - b)=(a2 - b2)
(a3 + b3)=(a + b)(a2 - ab + b2)
(a3 -b3)=(a -b)(a2 - ab + b2)
(A + B + C)2 = A2 + B2 + C2 + 2(AB + BC + CA)
(A3 + B3 + C3 - 3ABC)=(A + B + C)(AR> 2 + B2 + C2 - AB - BC - AC)
簡単なヒントとコツ
ステップ1:指定された式を簡素化する場合、最初の括弧は順序で削除されます: ' - '、 '()、' {} '、' [] '
ステップ2:操作は、順序で厳密に実行されます:分割、乗算、追加、および減算
Bodmasは、単純化の手順を思い出すために使用されるショートカットです。
B:ブラケット
O:注文(すなわち、電源、平方根など)
D:ディビジョン(左から右)
M:乗算(左から右)
A:追加(左から右)
S:減算(左から右)
ステップ1:指定された式を簡素化する場合、最初の括弧は順序で削除されます:()、{}、[]
ステップ2:操作は、順序で厳密に実行されます:分割、乗算、追加、および減算


**重要な式:**
重要な式
n自然数の平方= n(n+1)(2n+1)/2の合計
n自然数= n(n+1)/2の合計
ap = nx(a+l)/2の合計
最初のn奇数= nのAvg
最初のn偶数= n+1の平均
n naturat番号の平均=(n+1)/2
数の総数 *総数=合計
人口ベースの質問
比率と割合
コード/デコード
ログ
Amcatの言葉による質問
負の残り
適格性テスト
735/2
735/704
3/704
3/735
解決
Option A
Find the LCM of the numerators.
LCM (147, 30) = 1470
Step 2: Find the HCF of denominators.
HCF (64, 44) = 4
So, the LCM of 147/64 and 30/44 is (LCM of Numerators) / (HCF of Denominators) = 1470 / 4 = 735/2
a)5 mph
b)10 mph
c)12 mph
d)20 mph
解決
Option C
Let the speed of the river=x mph, then
Time taken row 30 miles upstream and 30 miles downstream = 30/(15-x) + 30/(15+x) = 9/2
= 10/(15-x) + 10/(15+x) = 3/2
= 2[10(15+x) + 10(15-x)] = 3(15-x)²
= 300 + 20x + 300 – 20x = 675 -3x²
x² = 25 or x=5
a)3日
b)4日
c)4.5日
d)5。4日
解決
option A
Working 5 hours a day, A can complete the work in 8 days = 5*8 = 40 hours
Working 6 hours a day, B can complete the work in 10 days = 6*10 = 60 hours
(A+B)’s 1 hour’s work = (1/40+1/60)
=(3+2)/120
= 1/24
Hence, A and B can complete the work in 24 hours which is equal to 3 days.
a)6.5リットル
b)5リットル
c)4リットル
d)7.5リットル
解決
Option B
A mixture of 40 liters of milk = 36 liters of Milk and 4 liters of water = 90:10 ratio
Now the new mixture should be in the ratio of 80:20
Hence 80% is equivalent to 36 liters (no addition of milk is done)
100% is (36/80)*100 = 45 liters of milk is present in the new mixture
Thus water shall be added= (45 – 36 – 4) = 5 liters of water
**or**

a)12深夜
b)午前3時
c)午前6時
d)午前9時
解決
Option D
Four different devices beep after every 30 mins, 60 mins, 90 mins and 105 mins.
LCM of 30,60,90 and 105 is 1260.
Which means the devices beep together after every 1260 mins = 1260/60 = 21 hours
Hence 12 noon + 21 hours = 9 a.m
a)21 m
b)26 m
c)28 m
d)29 m
解決
Option C
When A travels 100 m, B travels 75 m. Hence A:B = 100:75
When B travels 100 m, C travels 96 m. Hence B:C = 100:96
When B Travels 75 m, C travels (96 x 75)/100 = 72 m
Hence B:C = 75:72.
Therefore, A:B:C = 100:75:72.
So, when A Travels 100 m, C travels 72 m.
Therefore, A beat C by 28 m
a)62
b)68
c)66
d)69
解決
Option A
70% students passed in physics = 30% failed in Physics.
65% students passed in Chemistry = 35% failed in Chemistry
Percentage of students failed in both subject = 27%.
Percentage of students failed = 35 + 30 – 27
= 38%.
Percentage of students passed = 100 – 38% = 62%
a)40
b)60
c)100
d)160
解決
Option D
15 oxen take 80 days so, 6 oxen take x days
x = 15*80/6 = 200 days
20 oxen also take 80 day. So, 2 cows take y days
y = 20*80/2 = 800 days
Together work will be done in 800*200/(800+200) = 160 days
a)297/10377
b)188/121
c)21/34
d)33/163
解決

Solution: Option D
a)6c4
b)6p4
c)4^6
d)6^4
解決
C is correct because all 4 can get 4 ticket one by one
a)550
b)450
c)350
d)150
解決
Option B
Going through the options,
Taking Cost Price as Rs 450.
Profit = 650 – 450 = 200
Loss = 350 – 450 = 100
Clearly profit is twice the loss incurred.
Hence, Rs 450 is the correct option.
a)7時間30分
b)8時間
c)8時間15分
d)8時間25分
解決
Option C
In 1hr, Ronald types = 32/6 pages and Elan types = 40/5 pages
If they work together they will type = 32/6 + 40/5 = 40/3 pages in 1 hr
Time needed to complete the assignment is = (3 x 110)/40 = 33/4 = 8hrs 15mins
Hence, the time required is 8 hrs 15 mins.
a)20%減少
b)20%増加
c)10%増加した
d)10%減少
解決
Option D
Let the initial Price = Rs.100 and initial sales = 100
So, the initial revenue = Rs. 10000
Now, the price is reduced to 25% which is equal to Rs.75 and Sales is increased by 20% which is equal to 120.
Now new revenue = 120 x 75 = Rs. 9000
Change in revenue = (10000 – 9000) = Rs.1000 decrease
% decrease = (1000/10000) x 100 = 10%
Hence, the correct option is decrease of 10%.
a)19/21
b)3/7
c)2/21
d)1/3
解決
Option A
Probability of getting atleast one nestle chocolate = [(10C1 x 5C1) + 10C2] / 15C2
[(10 x 5) + (10 x 9)/2] / [(15 x 14)/2] = 19/21.
Hence, the required probability is 19/21.
a)Rs 7490
b)Rs 7350
c)Rs 8250
d)Rs 8530
e)これらのいずれもありません
解決
Option B
Solution:
Share of Anil : Share of Ruhi : Share of Teena is
2000×8 + 2600×4 : 2800×8 + 3200×4 : 4200×4
33 : 44 : 21
so share of Teena = 21/(33+44+21) × 34300 = Rs 7350
a)Rs 3200
b)Rs 4500
c)Rs 3800
d)Rs 3500
e)Rs 2800
解決:
Option C
Solution:
Rs 3800
Solution:
(7000-x)*8*4/100 = x [ (1 + 10/100)2 – 1] + 226
70*8*4 – 32x/100 = 21x/100 + 226
2240 – 226 = 53x/100
2014 = 53x/100
So, x = Rs 3800
a)16
b)18
c)12
d)10
e)22
解決:
Option A
Solution:
20 men in 8 days so 16 men in 20 × 8/16 = 10 days and
25 women in 12 days so 10 women in 25 × 12/10 = 30 days
So in 3 days, they complete (1/10 + 1/30) × 3 = 2/5
So remaining work = 1 – 2/5 = 3/5
20 m 1 work in 8 days and x men 3/5 work in 6 days
So 20 × 8 × 3/5 = x × 6 × 1
So, x = 16 men
a)3/5
b)2/9
c)1/8
d)3/7
e)これらのいずれもありません
解決:
Option D
Solution
Number of multiples of 3 in 140 = 140/3 = 46
Number of multiples of 7 in 140 = 140/7 = 20
Number of multiples of 3×7= 21 in 140 = 140/21 = 6
So required probability = (46+20 – 6)/140 = 60/140 = 3/7
A.母
B.姉妹
C. nie
D.母方の叔母
解決策c
a)a
b)b
c)c
d)e
解決:
E
Solution:
D is father of A and grandfather of F. So, A is father of F.
Thus. D and A are the two fathers. C is the sister of F So. C is the daughter of A.
Since there is only one mother, it is evident that E is the wife of A and hence the mother of C and F.
So, B is brother of A There are three brothers. So. F is the brother of C.
Clearly, A is E's Husband.
a)母
b)姉妹
c)叔母
d)祖母
解決:
C
Solution:
Only son of Amar's mother's father — Amar's maternal uncle.
So, the girl's maternal uncle is Arnar's maternal uncle. Thus, the girl's mother is Amar's aunt.
a)12
b)13
c)14
d)15
解決:
A
Solution:
A+B=B+C+12
so
A=12
解決:
P=(3*2*5)/1=30
Q=(4*2*5)/1=40
解決:
(150+x)/15=16.
=)150+x=240
=x=90
年齢の平均= sum/number =)90/5 = 18
A. 154°
B. 170°
C. 160°
D. 180°
解決:
We know that angle traced by hour hand in 12 hrs = 360°
From 8 to 2, there are 6 hours.
Angle traced by the hour hand in 6 hours = 6×360/12= 180°
A. 120°
B. 125°
C. 130°
D. 135°
解決:
C
Solution:
Angle traced by hour hand in 12 hrs. = 360°.
Angle traced by it in 11/3 hrs = (360/12 x 11/3)° = 110°.
Angle traced by minute hand in 60 min. = 360°.
Angle traced by it in 40 min. = (360/60x40)°= 240°.
Required angle (240 - 110)° = 130°.
A. 3.6
B. 7.2
C. 8.4
D. 10
解決:
B
Solution:
Speed =600/(5 x 60)= 2 m/sec.
Converting m/sec to km/hr (see important formulas section)
= (2 x18/5)km/hr= 7.2 km/hr.
A. 10
B. 8
C. 6
D. 4
解決:
C
Opposite direction
speed=60+6=66km/h
time=distance/speed=110/66=5/3 km/h
in m/s 5/3x18/5=6
A. 14.4秒
B. 15.5秒
C. 18.8秒
D. 20.2秒
解決 :
A
Solution :
Let length of each train be x meter.
Then, speed of 1st train = x/18m/sec
Speed of 2nd train = x/12 m/sec
Now,
When both trains cross each other, time taken
=2x/(x/18+x/12)=2x/(2x+3x)/36=(2x X 36)/5x=725=14.4seconds
767 495 359 291 257?
A. 230 B. 240 C. 250 D. 280 E. 260
ソルトン:
B
Solution:
797-495=272
495-359=136
So which means it is half of previous diffrences
272/2=136
291-257=32
34/2=17
So subtract 17
257-17=240
50 67 33 84 16?
A. 101 B. 109 C. 107 D. 103 E. 201
解決:
A
Solution:
17 is the gap once increase and than decrease follow this order you will get the answer
192
10
38
2
3
解決:
3
Solution:
Logic is 2×1 + 1 = 3, 3 × 2 + 4 =10, 10 × 3 + 9 = 39, 39 × 4 + 16 = 172…. So in place of 38, it should be 39.
999980
999990
999984
これらのどれも
解決:
Greatest six-digit number is 999999. Divide this number by 12 and get remainder as 3. Since the remainder is 3, if you subtract 3 from the number, the remaining number will be a multiple of 12. So the greatest such number will be 999999 – 3 =999996.
5000
4950
4980
4900
これらのどれも
解決:
Multiples of 3 between 100 and 200 are 102, 105, 108,… ,198.
Here, the first term = 102
last term = 198
Let the number of Multiples of 3 between 100 and 200 = n
W.K.T: Arithmetic Progression Formula:
an = a1 + (n - 1)d
Where, an = last term = 198
a1 = first term = 102
d = common difference = 105 - 102 = 3
---> 198 = 102 + (n - 1) * 3
---> 198 - 102 = (n - 1) * 3
---> 96 = (n - 1) * 3
---> (n - 1) = 96/3 = 32
---> n = 32 + 1
---> n = 33
Formula:
Sum of n terms = Sn = (n/2) * (a + l)
where n = number of elements = 33
a = first term = 102
l = last term = 198
Thus, using the above formula, Sum of all natural numbers between 100 and 200 which are multiples of 3 = (33/2) * (102 + 198)
= (33/2) * 300
= 33 * 150
= 4950
A. 5、15、25
B. 12、15、18
C. 10、15、20
D. -10、-15、-20
解決:
Assuming that the numbers are (a – d), a, (a + d) and their sum is 45, we get the middle number as 15. Now, the product (a – d) (a + d) = 200. Solving, we get d = 5. Therefore, the numbers are 10, 15 and 20.
解決:
x/(y+1)=1/2
and
(x+1)/y=1
2x-y=1 ....eq (1)
x=y-1 ....eq (2)
by solving eq 1 and 2 we get
x=2 and y=3
A. 80
B. 75
C. 42
D. 53
答え:
Option D
Solution:
As the Number gives a remainder of 4 when it is divided by 7, then the number must be in form of (7x + 4)
The same gives remainder 1 when it is divided 4, so the number must be in the form of {4 × (7x + 4) + 1}
Also, the number when divided by 3 gives remainder 2, thus number must be in form of [3 × {4 × (7x + 4) + 1} + 2]
Now, On simplifying,
[3 × {4 × (7x + 4) + 1} + 2]
= 84x + 53
We get the final number 53 more than a multiple of 84 Hence, if the number is divided by 84,
The remainder will be 53
a)55/601
b)601/55
c)11/120
d)120/11
解決:
Then, a + b = 55 and ab = 5 x 120 = 600.
The required sum =1a+1b = a+bab= 55600=11120
解決:
5
2、3、5、8、13、20、34
解決:
first+second=third
follow this order you get **20** as a answer
196、169、144、121、100、80
解決:
80
First - Second=2
A. CMN
B.ウジ
C. vij
D. IJT
解決:
C
オルニー
オニレン
ノイレン
lnoeni
onnlie
解決:
1
a。 9年
b。 10年
c。 13年
d。 15年
解決:
Correct Option: (c)
We have to find the population of cities A and B after x years.
Step 1: Population of city A = 68000, decreases at the rate of 1200/year
68000 – 1200x
Step 2: Population of city B = 42000, increases at the rate of 800/year
42000 + 800x
Step 3: Find after how many population of cities A and B are equal.
Population of city A = Population of city B
68000 – 1200x = 42000 + 800x
68000 – 42000 = 1200x + 800x
26000 = 2000x
x = 13
a。 28日
b。 30日
c。 34日
d。 40日
解決:
Correct Option: (b)
Step 1: Number of days worked by the worker = 60 and he remained idle for x days. Therefore, number of days worked = (60 – x)
Step 2: Each day he was getting paid Rs. 20. Therefore, the payment received for working days = (60 – x) 20
Step 3: After subtracting the amount which he forfeited, he receives Rs. 300.
Therefore,
(60 – x) 20 – 10x = 300
1200 – 20x – 10x = 300
900 = 30x
x = 30 days
a。 11
b。 15
c。 16
d。 18
解決:
Correct Option: (b)
Let’s the number of farmers be y.
Step 1: Find number of heads
= (50 hens + 45 goats + 8 horses + y farmers)
= (103 + y)
Step 2: Number of feet
= [(Hens 2 × 50) + (45 × 4) + (8 × 4) + (y × 2)]
= [100 + 180 + 32 + 2y]
= 312 + 2y
Step 3: Find number of farmers
(312 + 2y) – (103 + y) = 224
312 + 2y – 103 – y = 224
y = 15
a)49500
b)49950
c)45000
d)49940
解決:
The Correct answer is (B)
Answer with explanation:
The digit 5 has two place values in the numeral, 5 * 105 = 50,000 and 5 * 101 = 50.
∴Required difference = 50000 - 50 = 49950
a)Rs。 180
b)Rs。 204
c)Rs。 210
d)Rs。 220
解決:
Option B
CI=P(1+r/100)^t
CI=2500*(1+4/100)^2
CI=2704
So the diffrenece is 204
a)Rs。 5222.2
b)Rs。 5777.7
c)Rs。 6222.2
d)Rs。 6777.7
解決:
Option B
80000*12/65000*6=32/13
113/32*20000=5777.7rs
a)木曜日
b)水曜日
c)金曜日
d)日曜日
解決:
The correct option is (B)
Explanation:
The year 1996 is divisible by 4, so it is a leap year with 2 odd days.
As per the question, the first day of the year 1996 was Monday, so the first day of the year 1997 must be two days after Monday. So, it was Wednesday.
a)1.5 km/hr
b)2 km/hr
c)2.5 km/hr
d)1 km/hr
解決:
The correct answer is B
Answer with explanation:
Let the speed of stream = X km/hr
Speed of boat = 5 km/hr
Speed upstream = 3km/hr
Apply formula: Speed upstream = speed of boat - speed of stream
∴ 3 = 5 - X
X = 5 - 3 = 2 km/hr
a)24
b)22
c)23
d)21
解決:
The Correct answer is (B)
Explanation:
The hands of a clock coincide only once between 11 O' clock and 1 O' clock, so in every 12 hours, the hands of a clock will coincide for 11 times.
∴ In a day or 24 hours, the hands of a clock will coincide for 22 (11+11) times.
a)10時間
b)12時間
c)14時間
d)16時間
解決:
Option B
Water enter in 1 hr=1/6
Water empty in 1 hr=1/12
net=1/6-1/12=1/12
or 12hr
a)8.5 km/s
b)7.5 km/s
c)9.5 km/s
d)6.5 km/s
解決:
Option B
sec=4*60=240s
speed=500/240=25/12m/s
in km/s speed is =25/12*18/5=7.5km/s.
解決:
Surface area of cube=6a^2
600=6*a^2
a=10
diagonal of cube=sqrt(3)*a
ans=sqrt(3)*10
2つの数値のHCFは23で、LCMの他の2つの要因は13と14です。2つの数値のうち大きいのは次のとおりです。
A. 276
B. 299
C. 322
D. 345
解決:
Answer: Option C
Explanation:
Clearly, the numbers are (23 x 13) and (23 x 14).
Larger number = (23 x 14) = 322.
6つのベルが一緒に通行し、それぞれ2、4、6、8 10、および12秒の間隔で通行します。 30分で、彼らは何回一緒に通行しますか?
A. 4
B. 10
C. 15
D. 16
解決:
Answer: Option D
Explanation:
L.C.M. of 2, 4, 6, 8, 10, 12 is 120.
So, the bells will toll together after every 120 seconds(2 minutes).
In 30 minutes, they will toll together 30 + 1 = 16 times.
2
nを1305、4665、および6905を分割する最大数とし、それぞれの場合に同じ残りを残します。次に、nの数字の合計は次のとおりです。
A. 4
B. 5
C. 6
D. 8
解決:
Answer: Option A
Explanation:
N = H.C.F. of (4665 - 1305), (6905 - 4665) and (6905 - 1305)
= H.C.F. of 3360, 2240 and 5600 = 1120.
Sum of digits in N = ( 1 + 1 + 2 + 0 ) = 4
A. 9000
B. 9400
C. 9600
D. 9800
解決
Answer: Option C
Explanation:
Greatest number of 4-digits is 9999.
L.C.M. of 15, 25, 40 and 75 is 600.
On dividing 9999 by 600, the remainder is 399.
Required number (9999 - 399) = 9600.
a)50日
b)60日
c)84日
d)9.333日
解決:
Answer: C
Explanation:
Let 5 men can reap a field in x days
So, put the same quantities on the same side.
Men: Days
Now, Men and Days are inversely proportional to each other. If we increase the number of men fewer days will be required to complete the work.
Inversely proportional means Apti Chain Rule
Apti Chain Rule
i.e., 5: 15 = 28: x
Or, x = (28*15)/ 5
Or, x = 84 days
Hence, 5 men can reap a field in 84 days.
a)16
b)13/5
c)-16/3
d)12
解決:
Answer: C
Explanation:
Let log2√2 [1/256] = x
We know that loga y = x is similar to ax = y
So, we can write it as [1/256] = (2√2) x
Or, (2√2) x = [1/28]
Or, [21 * 21/2]x = 1/28
Or, 23x/2 = 2-8
Therefore, 3x/2 = -8
Hence, x = (-8 * 2)/ 3 = -16/3
解決:
(6!)/(2!)(2!)=180
解決:
You can see number less than 3! are not divisible by 8 so it decide your output
(1!+2!+3!)=9
9%8=1
1 is the answer
A. 2400
B. 2000
C. 1904
D. 1906
E.これらのいずれもありません
解決:
106 x 106 - 94 x 94 = (106)2 - (94)2
= (106 + 94)(106 - 94) [Ref: (a2 - b2) = (a + b)(a - b)]
= (200 x 12)
= 2400.
2つの数値の違いは1365です。より大きな数値を小さい方で割ると、6を商として、残りとして15を取得します。少ない数は何ですか?
A. 240
B. 270
C. 295
D. 360
回答:オプションb
説明:
Let the smaller number be x. Then larger number = (x + 1365).
x + 1365 = 6x + 15
5x = 1350
x = 270
Smaller number = 270
A. 1035
B. 1280
C. 2070
D. 2140
回答:オプションa
説明:
Let Sn =(1 + 2 + 3 + ... + 45). This is an A.P. in which a =1, d =1, n = 45.
Sn = n [2a + (n - 1)d] = 45 x [2 x 1 + (45 - 1) x 1] = 45 x 46 = (45 x 23)
2 2 2
= 45 x (20 + 3)
= 45 x 20 + 45 x 3
= 900 + 135
= 1035.
Shorcut Method:
Sn = n(n + 1) = 45(45 + 1) = 1035.
2 2
[A] 7時間30分
[b] 8時間
[c] 8時間15分
[D] 8時間25分
解決)
C)
Ronald 1 hr work = 32/6=16/3
Elan 1 hr work = 40/5=8
Show both work in an hr=8+16/3=40/3
Show for 110 pages it will take 110/(40/3) or (110 x 3)/40=33/4hr
Since: convert it into hr 4*8=32 1 left in 1 hr 60 min 60/4=15min
Show final answer is 8hr 15 mon
解決:
ソリューションへのリンク
4^x/4^x + 6^x/4^x = 9^x/4^x
Now,
1 + (3/2)^x=(3/2)^(2x)
Consider (3/2)^x=u
Then,
1 + u = u^2
Simplifying this
0 = u^2 -u -1
By solving we get
u = (1 + sqrt(5))/2
and this equal to
(1 + sqrt(5))/2 = (3/2)^x
Take log both side
and you get 1.187 approx value.
Solution:
circumference of an wheel=πd
=22/7×98
22×14
=308cm =1 revolution
distance covered
1540×100=154000
now,154000÷308
500 rotations
A. 2%
B. 2.02%
C. 4%
D. 4.04%
E.これらのいずれもありません
回答:オプションd
100 cm is read as 102 cm.
∴ A1 = (100 x 100) cm2 and A2 (102 x 102) cm2
(A2 - A1) = [(102)2 - (100)2]
= (102 + 100) x (102 - 100)
= 404 cm2
∴ Percentage error
=(404100×100×100)%=4.04%
Area of the square=484cm
side-22cm
perimeter=22*4=88cm
circumfrence of cirlce is 2*pi*r=88
r=14cm
area=pi*r*r=616cm^2
解決
P(A)=1/9
P(B)=1/6
P(C)=26/36=13/18
Apply GP
you get 2/5 ans