481 . The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child ?

A. 3
B. 4
C. 5
D. 6
E. None of them

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Answer: Option B

Explanation:

Let the age of the youngest child be x years
Then x+(x+3)+(x+6)+(x+9)+(x+12)=50
⇒5x+30=50⇒5x=20⇒x=4
∴ Age of the youngest child is 4 years.

Bangladesh Bank - Assistant Director - 2012

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সাবস্ক্রিপশন লিংক

482 . The sum of ages of 5 children born at the intervals of three years each is 50 years what is the age of the youngest child?

A. 4 years
B. 8 years
C. 9 years
D. None of these

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Answer: Option A

Explanation:

Let the ages of Kunal and Sugar 6 years ago be 6x and 5x years respectively.
Then, {(6x + 6) + 4}/{(5x + 6) + 4} = 11/10
⇒10(6x + 10) = 11(5x + 10)
⇒5x = 10
⇒x = 1
∴ Sagar's present age = (5x + 6) = 16 years.

অফিসার (ক্যাশ ) - Sonali | Rupali | BD Krishi | Rajshahi Krishi Unnayn | Investment Corporation Of Bangladesh - ২৯. ০৩.২০১৯

A. 16
B. 17
C. 18
D. 32

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Answer: Option A

Explanation:

(x-y)²=16

x²+y²=48

Now,

x²+y²=(x-y)²+2xy

Or,(48-16)/2=xy

Or, xy=16

(ans)

484 . The sum of the digits of two -digit number is 10, while when the digits are reversed , the number decrease by 54. Find the changed number .

A. 19
B. 46
C. 37
D. 28

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Answer: Option D

Explanation:

Let the original number is 82 i.e 8 + 2 = 10 and when the digits are reversed i.e 28 The difference is 82 - 28 = 54 i.e, the number is decreased by 54.

অফিসার (ক্যাশ ) - Sonali | Rupali | BD Krishi | Rajshahi Krishi Unnayn | Investment Corporation Of Bangladesh - ২৯. ০৩.২০১৯

A. 1
B. 2
C. 3
D. 4
E. None of them

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Answer: Option C

Explanation:

ATQ,
x + y = 5......(i) ,
xy = 4
So, x - y = 3 .....(ii)
We get from (i) + (ii) -
2x = 8
or, x = 5
So, y = 1
Now, x - y = 4 - 1 = 3

Bangladesh Bank - Assistant Director - 2012

A. 12, 5
B. 13, 4
C. 14, 3
D. 24, 10

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Answer: Option A

Explanation:

Hints: এই ম্যথটি করলে উত্তর দেখে করলে দ্রুত হয়। প্রশ্নমতে দুইটি সংখ্যাকে যোগ করে বড় সংখ্যা দিয়ে গুন করলে 204 হয়। প্রথম উত্তর দিয়ে = (12 + 5) × 12 = 204 মিলে গেছে। বাকি গুলা যদি না মেলে তাহলে এাটই উত্তর।

487 . The taxicab charges TK. 4.60 for the first 0.2 mile of a trip and TK. 1.20 for each of 0.2 of a mile or a part thereof . If the trip is 2.5 miles one way and the waiting charge is TK. 7.50 for 30 minutes or part thereof . What will be the fare for a roun

A. 50
B. 55
C. 60
D. 6.50
E. 75

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Answer: Option B

Explanation:

Total distance traveled = 2.5 × 2 = 5 miles

Charge for first 0.2 mile = Tk. 4.6

Charge for next 4.8 mile = 1.2 × 4.8/0.2 = Tk. 28.8

Waiting charge = 7.5 × 3 = Tk. 22.5

Total charge = 4.6 + 28.8 + 22.5 = Tk.55.9

Bangladesh Bank - Assistant Director - 2011

A. 1500
B. 14400
C. 16450
D. 12350
E. None of them

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Answer: Option B

Explanation:

Income in 2003 = x
Income in 2004 = .20x + x
income in 2005 = (x + .20x) + .20(x + .20x)
Now,x + .20x + x + x + .20x + .20x + .04x = 36400
x = 10000
income in 2005 = 14400

Bangladesh Bank - Assistant Director - 2012

A. 1:2
B. 2:3
C. 5:6
D. 1:4

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Answer: Option C

Explanation:

Let

Numbers are 4x and 5x

According to the question,

(4x - 4)/(5x - 4) = 3/4

or, 16x - 16 = 15x - 12

or, 16x - 15x = 12 + 16

or, x = 4

so the numbers are = 4*4 = 16 and 5*4 = 20

Adding 4 the numbers will be = 16 + 4 = 20 and 20 + 4 = 24

Required Ratio = 20:24

= 5:6 (divided by 4)

Ans: 5:6

Senior Officer- 8 Bank Recruitment Test 31-08-2018

A. 36
B. 72
C. 60
D. 100
E. None of these

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Answer: Option B

Explanation:

Let the time taken for one question be x

Then math question takes 2x

Remaining questions other than math questions are 150

then time taken for the remaining questions is 150x

Time taken to solve math questions = 50 × 2x = 100x

100x + 150x = 3 × 60

250x = 180

x = 180/250

Then time taken for math problems = 2 × 180/250 × 50 = 72

minute

491 . There are two numbers , 1 st number is 12 more than the 2nd number . The average of the two numbers is 19. If 2 is added in both numbers , find the ratio of the numbers .

A. 5 : 9
B. 11 : 9
C. 4 : 9
D. 9: 5

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Answer: Option D

Explanation:

ATQ,
x - y = 12
x + y = 38
.......................
2x = 50 (Adding the equations)
Or, x = 25
So, y = 13 Then, if 2 is added in both numbers , find the ratio of the numbers = x + 2/y + 2 = 27/15 = 9/5

Officer (General) -Ansar VDP Unnayan | BD House Building Finance Corporation 28.09.2018

A. 32
B. 12
C. 35
D. 14

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Answer: Option A

Explanation:

2x + 3y = 100 ..... (1)
3x + 2y = 120 ..... (2)
Multiply by 3 in Equation (1) and multiply by 2 in Equation (2) and then subtract
6x+9y=300
6x+4y=240
− − − ––––––––––––––––––
5y=60
y=12
x=32

বাংলাদেশ ব্যাংক অফিসার ০২ -১২-২০২২

A. 1 hour
B. 40 minutes
C. 30 minutes
D. 2 hours
E. None of these

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Answer: Option A

Explanation:

494 . Think of a number and then double the number, Add 6 and then multiply the number by 10. Now divide the number by 20, then subtract the number you first thought of, What is the result?

A. 5
B. 4
C. 3
D. 2

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Answer: Option C

Explanation:

Let, a number is = P

2P+6

10(2P+6)

10(2P+6)/20

10(2P+6)/20 - P

= (2P+6)/2 - P

= P+3 - P

= 3 (Ans)

সমন্বিত ৫ ব্যাংক | অফিসার ক্যাশ | 25-03-2022 ||

A. 20°
B. 10°
C. 30°
D. 25°

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Answer: Option A

Explanation:

ATQ,
5x + 6x + 7x = 180
Or, 18x = 180
Or, x = 10
So, the difference in degrees between the biggest and the smallest angles = 70 - 50 = 20 degree.

Sonali- Rupali- Bangladesh Krishi- Rajshahi krishi unnayn-Investment Corporation of Bangladesh | 30.11.2018

481 . The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child ?

Let the age of the youngest child be x years
Then x+(x+3)+(x+6)+(x+9)+(x+12)=50
⇒5x+30=50⇒5x=20⇒x=4
∴ Age of the youngest child is 4 years.

482 . The sum of ages of 5 children born at the intervals of three years each is 50 years what is the age of the youngest child?

483 . The sum of square of two numbers is 48 and the square of their diffrence is 16. The prodduct of the two number is-

484 . The sum of the digits of two -digit number is 10, while when the digits are reversed , the number decrease by 54. Find the changed number .

485 . The sum of two numbers is 5. And their product is 4 Then what is the difference between the numbers ?

486 . The sum of two positive integers multiplied by the bigger number is 204, and their difference multiplied by the smaller number is 35. The numbers are:

487 . The taxicab charges TK. 4.60 for the first 0.2 mile of a trip and TK. 1.20 for each of 0.2 of a mile or a part thereof . If the trip is 2.5 miles one way and the waiting charge is TK. 7.50 for 30 minutes or part thereof . What will be the fare for a roun

488 . The total income of Mr. Sakib in the years 2003 , 2004, and 2005 was TaKa 36,400 . His income increased by 20% each year. What was his income in 2005 ?

489 . There are 2 numbers in the ratio of 4:5. If 4 is subtracted from both numbers the ration becomes 3:4 . What will be the ratio if 4 is added in the both numbers?

490 . There are 200 questions on a 3-hour examination. Among these questions 50 are mathematics problems. It is suggested that twice as much as time be spent on each math problem as for each other question. How many minutes should be spent on mathematics problems?

491 . There are two numbers , 1 st number is 12 more than the 2nd number . The average of the two numbers is 19. If 2 is added in both numbers , find the ratio of the numbers .

492 . There are two numbers where the sum of twice the first number and thrice the second number is 100. And the sum of thrics the first number and twice the second number is 120. Which is the largest number?

494 . Think of a number and then double the number, Add 6 and then multiply the number by 10. Now divide the number by 20, then subtract the number you first thought of, What is the result?

495 . Three angles of a triangle are in proportion 5: 6: 7. Then what is the difference in degrees between he biggest and the smallest angles?

কোর্স ক্যাটাগরি

প্রয়োজনীয় লিঙ্ক

481 . The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child ?

Let the age of the youngest child be x years Then x+(x+3)+(x+6)+(x+9)+(x+12)=50 ⇒5x+30=50⇒5x=20⇒x=4 ∴ Age of the youngest child is 4 years.

482 . The sum of ages of 5 children born at the intervals of three years each is 50 years what is the age of the youngest child?

483 . The sum of square of two numbers is 48 and the square of their diffrence is 16. The prodduct of the two number is-

484 . The sum of the digits of two -digit number is 10, while when the digits are reversed , the number decrease by 54. Find the changed number .

485 . The sum of two numbers is 5. And their product is 4 Then what is the difference between the numbers ?

486 . The sum of two positive integers multiplied by the bigger number is 204, and their difference multiplied by the smaller number is 35. The numbers are:

487 . The taxicab charges TK. 4.60 for the first 0.2 mile of a trip and TK. 1.20 for each of 0.2 of a mile or a part thereof . If the trip is 2.5 miles one way and the waiting charge is TK. 7.50 for 30 minutes or part thereof . What will be the fare for a roun

488 . The total income of Mr. Sakib in the years 2003 , 2004, and 2005 was TaKa 36,400 . His income increased by 20% each year. What was his income in 2005 ?

489 . There are 2 numbers in the ratio of 4:5. If 4 is subtracted from both numbers the ration becomes 3:4 . What will be the ratio if 4 is added in the both numbers?

490 . There are 200 questions on a 3-hour examination. Among these questions 50 are mathematics problems. It is suggested that twice as much as time be spent on each math problem as for each other question. How many minutes should be spent on mathematics problems?

491 . There are two numbers , 1 st number is 12 more than the 2nd number . The average of the two numbers is 19. If 2 is added in both numbers , find the ratio of the numbers .

492 . There are two numbers where the sum of twice the first number and thrice the second number is 100. And the sum of thrics the first number and twice the second number is 120. Which is the largest number?

494 . Think of a number and then double the number, Add 6 and then multiply the number by 10. Now divide the number by 20, then subtract the number you first thought of, What is the result?

495 . Three angles of a triangle are in proportion 5: 6: 7. Then what is the difference in degrees between he biggest and the smallest angles?

Let the age of the youngest child be x years
Then x+(x+3)+(x+6)+(x+9)+(x+12)=50
⇒5x+30=50⇒5x=20⇒x=4
∴ Age of the youngest child is 4 years.