1831 . 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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1832 . If 3 - 2x ≤ 7, then--

A. x ≤ 2
B. x ≤ -2
C. x ≥ 2
D. x ≥ -2

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Answer: Option D

Explanation:

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1833 . 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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1835 . 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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1837 . 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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1839 . If 30% of A =0.25 of B=1/5th of C, the ratio of A,B and C is _____

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

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Answer: Option E

Explanation:

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Agrani Bank Ltd. Recruitment Test for Senior Officer 12.02.2010

A. 208
B. 416
C. 975
D. 312

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Answer: Option D

Explanation:

650× 32/100 = 2X/3

=> (3×650×32)/(100×2) = X

=> 312 =X

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1841 . If $\sqrt[3]{32} = 2^{x}$ then X is equalto:

A. $\frac{5}{3}$
B. $\frac{3}{5}$
C. $3$
D. $5$

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Answer: Option A

Explanation:

√32 = 2x

3 √ 8. 4 = 2x

2 3√4 = 2x

21 . 22/3 = 2x

25/3 = 2x

x = 5/3

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সাধারণ বীমা কর্পোরেশন || জুনিয়র অফিসার (12-07-2019)

A. -b
B. b + 2
C. 2b
D. 3b

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Answer: Option A

Explanation:

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1843 . If 35% of a number is 12 less than 50% of that number, then the number is:

A. 40
B. 50
C. 60
D. 80

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Answer: Option D

Explanation:

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1844 . If 36 students in a class are female and the ratio of female students to male students is 9 : 11, what percentage of the class is female?

A. 25%
B. 33.33%
C. 45%
D. 66.66%

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Answer: Option C

Explanation:

9x = 36

x = 4

So, 11x = 44

Percentage of female = 36/36 + 44 = 45%

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1845 . If 3a +5b = 10 and 5a + 3b = 30, what is the average (arithmetic mean) of a and b?

A. 4
B. 2.5
C. 3.5
D. 4.5

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Answer: Option B

Explanation:

Hints: average = a + b /2

এখন, 3a + 5b + 5a + 3b = 10 + 30

8 (a + b) = 40

a + b = 40/8

a + b/2 = 40/8 × 2 = 40/16 = 2.5

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1831 . If 2x=7 and 3y=2, then what is the value of 9xy?

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1832 . If 3 - 2x ≤ 7, then--

1833 . If 3 apples cost 19 cents, how many apples can be purchase for $1.52?

1834 . 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?

1835 . 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-

1836 . If 3 subtracted from a number, the result is 6 more than twice the number. The number is--

1837 . If 3/p = 6 and 3/q = 15 then p-q = ?

1838 . If 3/x = 2 and y/4 = 3, then (3 + y)/(x + 4) =?

1839 . If 30% of A =0.25 of B=1/5th of C, the ratio of A,B and C is _____

1840 . If 32% of 650 is equal to 2/3 of x, what is the value of x ?

1842 . If 32a + b = 16a + b, then a =?

1843 . If 35% of a number is 12 less than 50% of that number, then the number is:

1844 . If 36 students in a class are female and the ratio of female students to male students is 9 : 11, what percentage of the class is female?

1845 . If 3a +5b = 10 and 5a + 3b = 30, what is the average (arithmetic mean) of a and b?

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