3121 . the factor of x^2-5x-6 are

A. (x-6)(x+1)
B. (x+6)(x-1)
C. (x-3)(x+2)
D. (x-3)(x-2)

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Answer: Option A

Explanation:

x²-5x-6

=x²-6x+x-6

=x(x-6)+1(x-6)

=(x-6)(x+1)

(ans).

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Sonali Bank Ltd. Senior Officer Recruitment 01.06.2018

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3122 . The first 5 numbers in a regular esquence are 4, 10, 22, 46 and 94. What is the next number in the sequence?

A. 190
B. 182
C. 176
D. 154

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Answer: Option A

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3123 . The floor of a company's office has an area of 20000 square feet. If the floor is in the shape of a square approxmately how many feet long is each side?

A. 140
B. 450
C. 500
D. 1000

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Answer: Option A

Explanation:

If the floor of a company's office has an area of 20,000 square feet and is in the shape of a square, then each side of the square can be found by taking the square root of the area. Therefore, the approximate length of each side is:

sqrt(20,000) = 141.42 feet

Rounding to the nearest whole number, each side of the square is approximately 141 feet. Therefore, the answer is "140."

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3124 . The following figure consists of twenty-seven cubes. How many cubes will get closed on all sides by other cubes?

A. 1
B. 2
C. 3
D. 6

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Answer: Option A

Explanation:

27 টি Cube এর মধ্যে শুধু মাঝের ১টি Cube চারদিকে আবদ্ধ।

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Bangladesh Bank - Assistant Director - 2015

3125 . The formula $b + \frac{x}{a} = c$ is rearranged to make x the subject.What is x?

A. $a (c - b)$
B. $a c - b$
C. $\frac{c - b}{a}$
D. $a c + b$

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Answer: Option A

Explanation:

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সমন্বিত ৮টি ব্যাংক ও ১টি আর্থিক প্রতিষ্ঠান - সিনিয়র অফিসার (16-05-2025)

A. AB/C
B. BC/A
C. A/C + B
D. A + B/C

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Answer: Option A

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3127 . The greatest number which can divide 1356, 1868 and 2764, leaving the same remainder 12 in each case, is:

A. 64
B. 124
C. 156
D. 260

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Answer: Option A

Explanation:

Here, the required number will be the HCF of (1356-12), (1868-12) and (2764 - 12)

HCF of (1356-12), (1868-12) and (2764 - 12) = HCF of 1344, 1856 and 2752 = 64

∴ The greatest number which can divide 1356, 1868 and 2764 leaving the same remainder 12 in each case is 64.

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

A. 99
B. 89
C. 79
D. 69

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Answer: Option A

Explanation:

Hints Let another number = x

We know, product of two number = HCF × LCM

77 × x = 693 × 11

x = 693 × 11 / 77

x = 99

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3129 . The height of a cylinder is four times the radius of the cylinder. If the volume of the cylinder is 256 cm², what is the radius of the cylinder.

A. 4 cm
B. 8 cm
C. 16 cm
D. 24 cm

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Answer: Option A

Explanation:

To find the radius of the cylinder, we can use the formula for the volume of a cylinder, which is given by:

Volume = π * r^2 * h

where:

Volume is the volume of the cylinder,
π is the mathematical constant pi (approximately 3.14159),
r is the radius of the cylinder, and
h is the height of the cylinder.

We are given that the height of the cylinder is four times the radius, which can be expressed as h = 4r.

We are also given that the volume of the cylinder is 256 cm³. Plugging these values into the volume formula:

256 = π * r^2 * (4r)

Now, we can solve for r:

256 = 4πr^3

Divide both sides by 4π:

r^3 = 64

Now, take the cube root of both sides to find r:

r = ∛64

r = 4

So, the radius of the cylinder is 4 cm.

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

3130 . The height of a equilateral traingle with a side 2 cm is-

A. $\sqrt{3} c m$
B. $2 \sqrt{3} c m$
C. $3 \sqrt{2} c m$
D. $\sqrt{5} c m$

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Answer: Option A

Explanation:

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সমন্বিত ৭ ব্যাংক ও ১টি আর্থিক | সিনিয়র_অফিসার | 27-11-2021

3131 . The highest common factor (HCF) of $x^{2} - 1, x^{4} - 1$ and $x^{4} - x^{3} + x - 1$ is

A. $x^{6} - 1$
B. $x^{3} + 1$
C. $x^{2} - 1$
D. $x^{3} - 1$

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Answer: Option C

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অফিসার (জেনারেল) - 12.11.2021

A. 1 degree
B. 2 degree
C. 3 degree
D. 4 degree
E. 5 degree

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Answer: Option A

Explanation:

Move in 1 minute = 1/60 degree

:. Move in 60 minutes = (1/60)x60 = 1 degree

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Bangladesh Bank - Assistant Director - 2009

A. 13
B. 15
C. 17
D. 19

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Answer: Option C

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প্রবাসী কল্যাণ ব্যাংক-সিনিয়র অফিসার-09-10-2021

A. 7%
B. 8%
C. 9%
D. 10%

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Answer: Option D

Explanation:

Let,

The income of C is = 100

The income of B is = 75 (25% of C = 100*25% = 75)

The income of A is = 90 ( 20% higher of B = 75*120% = 90)

so, A's income less than C's income is = (100 - 90) = 10

Percent = 10/100*100 = 10% (Ans)

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

A. 10p + 20q
B. 30q
C. 30p
D. 20p + 10q

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Answer: Option A

Explanation:

Interest for the first month is 10×p
Interest for the next 2 month will be 2×10q
Total Interest = 10p + 20q

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

3121 . the factor of x^2-5x-6 are

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3122 . The first 5 numbers in a regular esquence are 4, 10, 22, 46 and 94. What is the next number in the sequence?

3123 . The floor of a company's office has an area of 20000 square feet. If the floor is in the shape of a square approxmately how many feet long is each side?

3124 . The following figure consists of twenty-seven cubes. How many cubes will get closed on all sides by other cubes?

3126 . The greatest common factor of two positive integers is A. The least common multiple of the two numbers is B. If one of the number is C, then what is the other one?

3127 . The greatest number which can divide 1356, 1868 and 2764, leaving the same remainder 12 in each case, is:

3128 . The H.C.F of two number is 11 and their L.C.M is 693. If one of the numbers is 77 find the other.

3129 . The height of a cylinder is four times the radius of the cylinder. If the volume of the cylinder is 256 cm², what is the radius of the cylinder.

3132 . The hour hand of an analog clock moves 1/60th of a degree every minute. Then how many degree will the hour hand move in one hour ?

3133 . The hypotenuse of a right triangle is 2 centimeters more than linger side of the triangle. The shorter side of the triangle is 7 centimeters less than the longer side. Find the length of the hypotenuse.

3134 . The income of 'A' is 20% higher than that of 'B' . The income of 'B' is 25% less than of 'C' What percent less is A ' s income form C's income?

3135 . The interest charged on a loan is p dollars per $1,000 for the first month and q dollars per $1,000 for each month after the first month . How much interest will be charged during the first three months on a loan of $ 10,000?

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