3151 . The student of a school were asked to name their favorite type of pet, Of the 430 student surveyed, 258 said that their favorite type of pet was a dog, Suppose that only 150 students were surveyed, with similar results, about how many students would say that a dog is their type of pet?

A. 58
B. 90
C. 98
D. 146

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Answer: Option B

Explanation:

নির্ণেয় ছাত্র সংখ্যা = (258 × 150)÷430 = 90

প্রিমিয়াম প্ল্যান: ১ মাস

99 ৳

৩০ দিনের জন্য সকল লাইভ এবং আর্কাইভ মডেল টেস্ট, প্রশ্ন ব্যাংক ও লেকচার শিট সহ অ্যাপ এর প্রিমিয়াম সব এক্সেস পাবেন।

সাবস্ক্রিপশন লিংক

3152 . The sum and difference of the L.C.M and H.C.F. of two numbers are 592 and 518 respectively. If the sum of the numbers be 296, find the product of the numbers.

A. 20535
B. 25550
C. 30550
D. 28430

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Answer: Option A

Explanation:

সিকিউরিটি প্রিন্টিং কর্পোরেশন বাংলাদেশ | সহকারী ব্যবস্থাপক- 26-11-2021

A. 1104
B. 972
C. 672
D. 294

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Answer: Option B

Explanation:

ধরি, পূর্ণসংখ্যা তিনটির মাঝের সংখ্যা = x
∴বৃহত্তম সংখ্যাটি = 3x
এবং ক্ষুদ্রতম সংখ্যাটি = 3x - 23
প্রশ্নমতে,
(3x - 23) + x + 3x = 40
⇒ 7x - 23 = 40
⇒ 7x = 63
∴ x = 9
∴ সংখ্যা তিনটি 4, 9 এবং 27
এদের গুণফল (Product) = 972 ।

3154 . The sum of 3 consecutive integers is less than 75. what is the greatest possible value of the smallest one?

A. 16
B. 19
C. 22
D. 23

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Answer: Option D

Explanation:

ধরি,

সংখ্যা তিনটি যথাক্রমে

x - 1, x, x + 1

x - 1 + x + x + 1 <75

3x <75

x<75/3

x<25

যেহেতু x<25 এবং পূর্ণসংখ্যা সেহেতু x = 24

ছোট সংখ্যাটি = ( 24 - 1 ) = 23

Assistant Director (General) 06.07.18

A. 19
B. 21
C. 23
D. 17

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Answer: Option A

Explanation:

x , x + 2 , x + 4

x + x + 2 + x + 4 = 57

3x = 51

x = 17

The middle number = x + 2 = 17 + 2 = 19.

Bangladesh Bank - Assistant Director - 2010

A. 57
B. 72
C. 42
D. 50

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Answer: Option B

Explanation:

Let x represent the smallest number. Then the other number are

x + 2, x + 4, x + 6, x + 8 and x + 10. x + 10 is the largest.

The sum of these is 6x + (2 + 4 + 6 + 8 + 10) = 6x + 30

We are told that this is 38 greater than twice the largest, so

6x + 30 = 2(x + 10) + 38 = 2x + 58.

or, 4x = 28

∴x = 7

Then the sum is 6×7 + 30 = 72.

3157 . The sum of a number and its inverse (or reciprocal) is equal to twice the number. What is the number?

A. 1 or -1
B. -2
C. 1
D. -1

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Answer: Option A

Explanation:

3158 . The sum of ages of 5 children born at intervals of 3 years each is 50 years. What is the age of the youngest child?

A. None of these
B. 5years
C. 8years
D. 10years
E. None of these

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Answer: Option A

Explanation:

Let,

The age of the youngest child = x year

The age of the 2nd children = ( x + 3) year

The age of the 3rd children = ( x + 3 + 3) year

Tne age of the 4th children = ( x + 6 + 3) year

The age of the 5th children = ( x + 9 + 3) year

According to question,

x + x + 3 + x + 6 + x + 9 + x + 12 = 50

5x + 30 = 50

5x = 50 - 30

5x = 20

x = 4

So, the age of the youngest child is 4 years.

3159 . The sum of first 17 terms of the series 5, 13, 17, --- is -

A. 529
B. 462
C. 629
D. 523

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Answer: Option C

Explanation:

এখানে, প্রথম পদ a = 5

সাধারন অন্তর d = 9 - 5 = 4

পদসংখ্যা n = 17

17 টি পদের সমষ্টি = 17/2 { 2 × 5 + ( 17 - 1) 4 } = 629.

অফিসার (সাধারণ) ২৭.১২. ২০১৯

A. 11
B. 18
C. 26
D. 28

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Answer: Option D

Explanation:

প্রথম পাঁচটি মৌলিক সংখ্যার সমষ্টি = 2 + 3 + 5 + 7 + 11 = 28

3161 . The sum of five consecutive integers is equal to 3 times the largest. What is the largest of the integers?

A. 8
B. 7
C. 6
D. 5

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Answer: Option D

Explanation:

Let the integers from smallest to largest be x - 2, x - 1, x, x + 1 & x + 2 respectively.

Then, x - 2 + x - 1 + x + x + 1 + x + 2 = 3(x + 2)

or, 5x = 3x + 6

or, 5x - 2x = 6

or, 2x = 6

or, x = 3

So, the largest intger is 3 + 2 = 5.

3162 . The sum of four consecutive even integers is 60. What is the value of the largest number?

A. 14
B. 24
C. 22
D. 20

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Answer: Option C

Explanation:

সমন্বিত ৭ ব্যাংক || সিনিয়র অফিসার-05-11-2021 ||

A. 67
B. 128
C. 191
D. 197
E. None of them

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Answer: Option B

Explanation:

Prime numbers that are greater than 60 but less than 70 are 61 and 67. So, their sum is = 61 + 67 = 128

3164 . The sum of principal and simple interest of a certain amount of money would be Tk. 460- after 3 years from now and Tk. 500 after 5 years from now. What is the total interest rate?

A. 5%
B. 12%
C. 15%
D. 20%

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Answer: Option A

Explanation:

Interest in 2 years=500-460=40 taka

So, Interestper year=40/2=20 taka

So, Principal=460-(3×20)=400 taka

So, r=(I/pn)×100%

=(20/400)×100%

=(1/20)×100%

=5%

(ans).

Three Combined Bank Recruitment - Senior Officer 03 .08.2018 ||

A. 18%
B. 15%
C. 26%
D. 5%

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Answer: Option D

Explanation:

(5 - 3) = 2 years interest = (500 - 460) = 40 tk

1 years interest = 40/2 = 20 tk

3 year's interest 20 × 3 = 60 tk

Principle amount = (460 - 60) = 400 tk

Interest rate = (60×100)/(400×3) = 5% (ans).

Bangladesh Bank - Assistant Director - 2010

3151 . The student of a school were asked to name their favorite type of pet, Of the 430 student surveyed, 258 said that their favorite type of pet was a dog, Suppose that only 150 students were surveyed, with similar results, about how many students would say that a dog is their type of pet?

3152 . The sum and difference of the L.C.M and H.C.F. of two numbers are 592 and 518 respectively. If the sum of the numbers be 296, find the product of the numbers.

3153 . The sum o three integers is 40. The largest integer is 3 times the middle integer, and the smallest integer is 23 less than the largest integer. what is the product of the three integers?

3154 . The sum of 3 consecutive integers is less than 75. what is the greatest possible value of the smallest one?

3155 . The sum of 3 consecutive odd numbers is 57. The middle one is

3156 . The sum of 6 consecutive odd numbers exceeds twice the largest by 38. Find the sum of the six numbers?

3157 . The sum of a number and its inverse (or reciprocal) is equal to twice the number. What is the number?

3158 . The sum of ages of 5 children born at intervals of 3 years each is 50 years. What is the age of the youngest child?

3159 . The sum of first 17 terms of the series 5, 13, 17, --- is -

3160 . The sum of first five prime numbers is :

3161 . The sum of five consecutive integers is equal to 3 times the largest. What is the largest of the integers?

3162 . The sum of four consecutive even integers is 60. What is the value of the largest number?

3163 . The sum of prime numbers that are greater than 60 but less than 70 is --

3164 . The sum of principal and simple interest of a certain amount of money would be Tk. 460- after 3 years from now and Tk. 500 after 5 years from now. What is the total interest rate?

3165 . The sum of principal and simple interest of a certain amount of money would be TK. 460 after three years from now and TK. 500 after 5 years from now . What is the related interest rate ?

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