1831 . If $2^{n} = 32$ then what is $n^{2} = ?$

A. 16
B. 25
C. 64
D. 56

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Answer: Option B

Explanation:

2ⁿ =32

=> 2ⁿ = 25

=> n = 5

=> n² =25

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স্বাস্থ্য অধিদপ্তর ।। মেডিকেল টেকনোলজিস্ট (06-05-2023) ||

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1832 . If 2x

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

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Answer: Option D

Explanation:

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Probationary Officer | 31.03.2017 ||

A. 2
B. 4
C. 3
D. 10

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Answer: Option C

Explanation:

2x + 7 = 12

= > 2x = 12 - 7

= > 2x = 5

= > x = 2.5

4x - 7 = 4. 2.5 - 7 = 10 - 7 = 3

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1834 . If 2x + 2y = 7z, then what is the average of x, y and z?

A. 1.5z
B. 3z
C. 2z + 1
D. z/3

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Answer: Option A

Explanation:

Given that, 2X + 2Y = 7Z

So, X + Y = (7/2) Z

Now, average = (X + Y + Z)/ 3 = { (7/2)Z + Z} /3 = 9Z/6 = 1.5 Z

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1835 . If 2x - 4 < 4, then--

A. x > 2
B. x < 2
C. 2 < x < 4
D. x < 4

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Answer: Option D

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1836 . If 2x - y = 4 then 6x - 3y =?

A. 12
B. 10
C. 4
D. 6

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Answer: Option A

Explanation:

Hints : 2x - y = 4

3(2x - y) = 3 × 4 [ both side 3 multiply]

6x - 3y = 12

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1837 . If 2x-3 is an odd integer, find the next even integer.

A. 2x-5
B. 2x-4
C. 2x-2
D. 2x+1

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Answer: Option C

Explanation:

পরের Even integer হবে ( 2x - 3 + 1) = 2x - 2

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1838 . If 2x=7 and 3y=2, then what is the value of 9xy?

A. 21
B. 18
C. 22
D. 28

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Answer: Option A

Explanation:

(2x)(3y) = 7×2

= > 6xy = 14

Multiply both sides by 3/2

∴9xy = 21

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1839 . If 3 - 2x ≤ 7, then--

A. x ≤ 2
B. x ≤ -2
C. x ≥ 2
D. x ≥ -2

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Answer: Option D

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1840 . If 3 apples cost 19 cents, how many apples can be purchase for $1.52?

A. 15
B. 19
C. 22
D. 24

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Answer: Option D

Explanation:

in the question there was a rate of 3 apples costr 19 cents

now 1 dollar = 100 cents

so total = 1.52 x 100 = 152 cents

now the number of apples( number x 3) = 152/ 19

= 8

so total number of apples = 8 x 3

= 24 apples

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Sonali-Janata-Agrani &amp-Rupali Bank Ltd. &amp-RAKUB Officer Recruitment 28.03.2008

A. 15/21
B. 12/18
C. 18/32
D. 10/17

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Answer: Option B

Explanation:

(x+3)/(y+3)=5/7

or, 7x-5y=-6…(1)

(x-9)/(y-9)=1/3

or, 3x-y=18…(2)

by solvingboth of the equatios,

x=12, y=18

So, x/y=12/18

(ans)

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1842 . If 3 sides of a triangle are 6 cm, 8 cm, and 10 cm, then the altitude of the triangle, using the largest side as its base, will be-

A. 4.8 cm
B. 4.4 cm
C. 6 cm
D. 8 cm

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Answer: Option A

Explanation:

a = 6 cm, b = 8 cm, c = 10 cm So, s = \frac{a + b + c}{2} = \frac{6 + 8 + 10}{2} = \frac{24}{2} = 2 area of triangle = \frac{1}{2} \times base \times height = \sqrt{s (s - a) (s - b) (s - c)} or, \frac{1}{2} \times base \times height = \sqrt{12 (12 - 6) (12 - 8) (12 - 10)} or, \frac{1}{2} \times base \times height = \sqrt{12 \times 6 \times 8 \times 2} or, \frac{1}{2} \times base \times height = \sqrt{576} or, \frac{1}{2} \times 10 \times height = 24 or, height = \frac{48}{10} = 4.8 cm

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বাংলাদেশ ব্যাংক || সহকারী পরিচালক (AD) (20-10-2023)

A. -3
B. -9
C. 3
D. 9/7

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Answer: Option B

Explanation:

Let the number be X.

Then, X - 3 = 2X + 6

or, 2X - X = - 3 - 6

or, X = - 9

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1844 . If 3/p = 6 and 3/q = 15 then p-q = ?

A. 1/3
B. 2/5
C. 3/10
D. 5/6
E. None of these

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Answer: Option C

Explanation:

3/p = 6

p = 3/6 = 1/2

3/q = 15

q = 3/15 = 1/5

p - q = 1/2 - 1/5 = 5 - 2 /10 = 3/10

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Bangladesh Bank - Assistant Director - 2009

A. 10/9
B. 3/2
C. 20/11
D. 30/11

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Answer: Option D

Explanation:

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1832 . If 2x

1833 . If 2x+7=12, then what is the value of 4x-7?

1834 . If 2x + 2y = 7z, then what is the average of x, y and z?

1835 . If 2x - 4 < 4, then--

1836 . If 2x - y = 4 then 6x - 3y =?

1837 . If 2x-3 is an odd integer, find the next even integer.

1838 . If 2x=7 and 3y=2, then what is the value of 9xy?

1839 . If 3 - 2x ≤ 7, then--

1840 . If 3 apples cost 19 cents, how many apples can be purchase for $1.52?

1841 . If 3 is added to both the numerator & the denominator of a fraction, it becomes 5/7. If 9 is subtracted from both the numerato & denominator, it become 1/3. What is the fraction?

1842 . If 3 sides of a triangle are 6 cm, 8 cm, and 10 cm, then the altitude of the triangle, using the largest side as its base, will be-

1843 . If 3 subtracted from a number, the result is 6 more than twice the number. The number is--

1844 . If 3/p = 6 and 3/q = 15 then p-q = ?

1845 . If 3/x = 2 and y/4 = 3, then (3 + y)/(x + 4) =?

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