646 . 666 ÷ 6 ÷ 3 = ?

A. 37
B. 333
C. 111
D. 84

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Answer: Option A

Explanation:

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647 . 7 is 5% of what number ?

A. 128
B. 156
C. 140
D. 135

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Answer: Option C

Explanation:

7 is 5% = 7 × 5/100

বা, 7 × 1/20

বা, 7/0.05 = 140

আশা করি বুঝতে পারছেন

ধন্যবাদ

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Bangladesh Bank - Officer - 2001

A. 20
B. 30
C. 40
D. 60

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Answer: Option A

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পূবালী ব্যাংক লিমিটেড || প্রবেশনারি অফিসার (30-09-2023) || 2023

A. 250
B. 320
C. 200
D. 240

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Answer: Option A

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650 . 729ml of a mixture contains milk and water in ratio 7 : 2 . How much of the water is to be added to get a new mixture containing half milk and half water ?

A. 405ml
B. 81ml
C. 72ml
D. 91ml

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Answer: Option A

Explanation:

729 * 7/9 = 81 * 7 = 567 = Milk

729 * 2/9 = 81 *2 = 162 = Water

Water to be added : 567 - 162 = 405.

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Bangladesh Bank - Assistant Director - 2010

A. 0.04
B. 0.50
C. 0.06
D. 0.060

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Answer: Option C

Explanation:

0.08% × 75% = 0.08 × 75/100 = 0.06

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Bangladesh Bank - Assistant Director - 2010

A. 4242
B. 4155
C. 1123
D. 11023

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Answer: Option B

Explanation:

Let 7589−x=3434
Then, x=7589−3434=4155

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পূবালী ব্যাংক লিমিটেড || প্রবেশনারি অফিসার (30-09-2023) || 2023

A. 76
B. 84
C. 100
D. 112

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Answer: Option A

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654 . 8 is added to x. The sum is multiplied by 3. The product is devided by 2. Then 7 is subtracted from the quotient. The remainder is 50. Therefore x is--

A. 35
B. 20
C. 30
D. 40

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Answer: Option C

Explanation:

First, x+8

Second, 3(x+8)

Third, 3(x+8)/2

Fourth, 3(x+8)/2 - 7= 50

=> 3(x+8)/2 = 57

=> 3(x+8) =114

=> x+8 = 38

=> x = 30

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655 . 8 males and 6 females can do a piece of work in 5 days, 5 males and 6 females can complete the same work in 7 days . How many days will a female take to do the job, if she works alone?

A. 135 days
B. 142 days
C. 110 days
D. 126 days

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Answer: Option D

Explanation:

(8M + 6F) × 5 = (5M + 6F) × 7

= > 40M + 30F = 35M + 42F

= > 5M = 12F

Now, (5M + 6F) = 12F + 6F = 18F

18F can do in = 7 days

1F can do in = 18x 7 = 126 days Ans.

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Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯

A. 138 years
B. 164 years
C. 148 years
D. 152 years

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Answer: Option C

Explanation:

A:B  = 4 :5 [8 years ago] 
 = 32:40 [multiplying by 12]
 = 32   +  8:40   +  8 [present]
 = 40 :48
B:C  = 4 : 5
 = 48 : 60 [multiplying by 12]
∴ A :B :C  = 40 : 48 : 60 
The sum of the ages of 
A,B and C 
 = 40   +  48   +  60 
 = 148 years

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জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯

A. 150
B. 140
C. 130
D. 160

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Answer: Option D

Explanation:

Let's call the number we're trying to find "x." According to the problem, when we add 85% of x to 24, we get the same number x. Mathematically, this can be expressed as:

0.85x + 24 = x

Now, let's solve for x:

First, subtract 0.85x from both sides of the equation:

0.85x - 0.85x + 24 = x - 0.85x

24 = 0.15x

Next, divide both sides by 0.15 to isolate x:

x = 24 / 0.15

x = 160

So, the number is 160

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658 . 8597- ? = 7429 - 4358

A. 5426
B. 5706
C. 5526
D. 5476

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Answer: Option C

Explanation:

Step 1: 7429-4358 = 3071

Step 2:

let , 8597 - x = 3071

x = 8597 - 3071

x = 5526

Ans: 5526

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পূবালী ব্যাংক লিমিটেড || জুনিয়র অফিসার (30-09-2023) || 2023

A. 256
B. 258
C. 268
D. 358

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Answer: Option B

Explanation:

88% of 370+24% of 210 − x=118

(88/100) × 370+ (24 / 100 ) × 210 − x=118

0.88 × 370 + 0.24 × 210 −x =118

325.6 + 50.4 − 118 = x
x = 258

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পূবালী ব্যাংক লিমিটেড || জুনিয়র অফিসার (30-09-2023) || 2023

660. A number for each figures are given from 1 to 9 . Find out the best method of classification and identify this amongst the four alternative .

A. (1,3,5),(2,6,9),(4,7,8)
B. (2,3,4),(5,6,8),(9,1,7)
C. (1,3,5),(2,6,8),(4,7,9)
D. (3,2,4),(6,5,8),(7,9,1)

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Answer: Option C

Explanation:

(1,3,5) চিত্রগুলো বৃত্ত সম্পর্কিত।
(2,6,8) ,, ত্রিভুজ ,, ।
এবং (4,7,9) ,, চতুর্ভুজ ,, ।

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Bangladesh Bank - Assistant Director - 2015

646 . 666 ÷ 6 ÷ 3 = ?

647 . 7 is 5% of what number ?

648 . 7 is added to a certain number, the sum is multiplied by 5; the product is divided by 9 and 3 is subtracted from the quotient. The remainder deft is 12. The number is:

649 . 72% of the students of a certain class took Biology and 44% took mathematics. If each students took Biology or Mathematics or both. If 40 students took both Biology and Mathematics then the total number of students in the class was---

650 . 729ml of a mixture contains milk and water in ratio 7 : 2 . How much of the water is to be added to get a new mixture containing half milk and half water ?

651 . 75% of 0.08 = ?

652 . 7589-? = 3434

653 . 8, 14, 24, 42, ......, 142

654 . 8 is added to x. The sum is multiplied by 3. The product is devided by 2. Then 7 is subtracted from the quotient. The remainder is 50. Therefore x is--

655 . 8 males and 6 females can do a piece of work in 5 days, 5 males and 6 females can complete the same work in 7 days . How many days will a female take to do the job, if she works alone?

656 . 8 years ago, the ratio of A's age to B's age was 4 :5 At present the ratio of B's age and C's age is 4 : 5 At present , the difference between A's age and C's age is 20 years, then what is the sum of the ages of A, B and C?

657 . 85% of a number is added to 24, the result is the same number. Find the number?

658 . 8597- ? = 7429 - 4358

659 . 88% of 370 + 24% of 210-?= 118. What stands for question mark?

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