1561 . Fifteen percent of the people in Chittagong have unlisted phone numbers. If you select 300 names at random from the phone directory, what is the expected number of people who will have an unlisted phone unmber?

A. 15
B. 145
C. 300
D. None of these

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Answer: Option D

Explanation:

Phone number unlisted মানে তাদের নম্বর list - এর মধ্যে (Telephone directory) নেই। তাহলে Directory থেকে 300 নাম্বার এমনকি সব নাম্বার সিলেক্ট করলেও তার ভিতর unlisted number পাওয়ার সম্ভাবনা শূন্য (0)।

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1562 . Fill in the blank in the series : 000, 001, 011, -

A. 111
B. 101
C. 010
D. 110
E. 011

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Answer: Option A

Explanation:

In every time left side 0 is replaced by 1 so

000,001,011,111

Ans : 111

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1563 . Fill in the blank in the series: 000, 001, 011, ---

A. 111
B. 101
C. 010
D. 110

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Answer: Option A

Explanation:

In every time left side 0 is replaced by 1 so

000,001,011,111

Ans : 111

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1564 . Find an equation for the line with x- intercept = 2, Y - Intercept=-1 .

A. 2x - y = 1
B. x - 2y= 2
C. y = - 1
D. x = 2

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Answer: Option B

Explanation:

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সমন্বিত ৮ ব্যাংক ও ১ আর্থিক প্রতিষ্ঠান — অফিসার (জেনারেল) (04-07-2025) | 2025

A. x = 3
B. y = 3
C. y = 2
D. x = 2

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Answer: Option C

Explanation:

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সমন্বিত ৮ ব্যাংক ও ১ আর্থিক প্রতিষ্ঠান — অফিসার (জেনারেল) (04-07-2025) | 2025

A. 100
B. 128
C. 145
D. 112

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Answer: Option B

Explanation:

Go on subtracting 24, 21, 18, 15, 12, 9 from the numbers to get the next number. 190 – 24 = 166 166 – 21 = 145 145 – 18 = 127 [Here, 128 is placed instead of 127] 127 – 15 = 112 112 – 12 = 100 ... and so on. Therefore, 128 is wrong.

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সমন্বিত ১০ ব্যাংক ও আর্থিক প্রতিষ্ঠান || অফিসার (জেনারেল) (08-03-2024)

A. Tk.5
B. Tk.0.40
C. Tk.0.60
D. None of these

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Answer: Option B

Explanation:

(dividend rate / 100) * par value for the preferred stock = annual preferred dividends

So, dividend per share received= (4 × 10)/100

= 0.40 tk

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1568 . Find the area of a right angled triangle whose hypotenuse is 10 cm and base 8 m.

A. 24 sq.cm
B. 34 sq.cm
C. 36 sq.cm
D. 48 sq.cm

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Answer: Option A

Explanation:

ত্রিভুজটির লম্ব

AB2 = AC2 - BC2

= ( 10) 2 - ( 8)2

= 100 - 64

= 36

AB = 6

ত্রিভুজটির ক্ষেত্রফল = 1/2 × 8 × 6 = 24 sq.cm

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1569 . Find the area of the triangle formed by the points located at (5,2), (-9,-3) and (-3,-5).

A. 27 square unit
B. 29 square unit
C. 31 square unit
D. 20 square unit

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Answer: Option B

Explanation:

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1570 . Find the average of all the numbers between 6 and 34 which are divisible by 5.

A. 18
B. 20
C. 24
D. 30

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Answer: Option B

Explanation:

average = (10 + 15 + 20 + 25 + 30)_⁄5 = 100_⁄5 = 20.

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

A. 44
B. 45
C. 46
D. 47
E. None of them

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Answer: Option E

Explanation:

The numbers are 3, 13, 23.33.......93

So difference between each number is same. This series in AP.

The avarage formula for AP is (first + last term)/2

Therefore the answer is (3 + 93)/2 = 48.

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1572 . Find the average of m, m+1, and m+2.

A. 1
B. m+1
C. m+2
D. m

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Answer: Option B

Explanation:

Answer:

The average of m, m+1 and m+2 is m+ 1.

Step-by-step explanation:

The formula to calculate the average of given numbers is equal to the sum of all the values divided by the total number of values.

Given : m, m + 1, m+ 2

Find ; Average

Sum of the values = m + m+1 + m+ 2 = 3m + 3 = 3(m + 1)

Total number of values = 3

So, Average = Sum of the values ÷ Total number of values

= 3(m + 1) ÷ 3

Average = m + 1

So, the average of m, m+1 and m+2 is m+ 1.

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DESCO Recruitment Test 2022 | Sub Station Attendant | 17.09.2022

A. tk. 4641
B. tk. 4732
C. tk. 4321
D. tk. 899

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Answer: Option A

Explanation:

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1574 . Find the compound interest on Tk. 15,625 for 9 months at 16% per annum compounded quarterly.

A. Tk. 1851
B. Tk. 1941
C. Tk. 1951
D. Tk. 1961

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Answer: Option C

Explanation:

P = TK.15, 625, n = 9 months = 3 quarters, R = 16% p.a = 4% quarter.

Amount = TK.[ 15625 × (1 + 4/100)2 = TK.

(15626 × 26/25 × 26/25 × 26/25) = TK.17576

C.I = TK.(17576 - 15625) = TK.1951

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1575 . Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.

A. 4
B. 7
C. 9
D. 13

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Answer: Option A

Explanation:

To find the greatest number that will divide 43, 91, and 183, leaving the same remainder in each case, you can use the following approach:

Find the differences between the numbers:

Difference between 91 and 43: 91 - 43 = 48
Difference between 183 and 91: 183 - 91 = 92

Now, find the greatest common divisor (GCD) of these differences: GCD(48, 92)

Calculate the GCD: GCD(48, 92) = 4

So, the greatest number that will divide 43, 91, and 183, leaving the same remainder in each case, is 4. Therefore, the answer is 4.

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1561 . Fifteen percent of the people in Chittagong have unlisted phone numbers. If you select 300 names at random from the phone directory, what is the expected number of people who will have an unlisted phone unmber?

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1562 . Fill in the blank in the series : 000, 001, 011, -

1563 . Fill in the blank in the series: 000, 001, 011, ---

1564 . Find an equation for the line with x- intercept = 2, Y - Intercept=-1 .

1565 . Find an equation of the horizontal line containing the point (3, 2).

1566 . Find out the wrong number in the series: 190, 166, 145, 128, 112, 100, 91

1567 . Find the amount of dividend per share received annually by a stock holder for the following: par value Tk.10, dividend rate 4% and dividend payable annually.

1568 . Find the area of a right angled triangle whose hypotenuse is 10 cm and base 8 m.

1569 . Find the area of the triangle formed by the points located at (5,2), (-9,-3) and (-3,-5).

1570 . Find the average of all the numbers between 6 and 34 which are divisible by 5.

1571 . Find the average of all whole number between 1 and 100 that end in 3.

1572 . Find the average of m, m+1, and m+2.

1573 . Find the compound interest at the rate of 10% per annum for four yearss on the principal which in four years at the rate of 4% per annum gives tk. 1600 as simple interest.

1574 . Find the compound interest on Tk. 15,625 for 9 months at 16% per annum compounded quarterly.

1575 . Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.

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