Exams Questions and Answers

Q:

Guess the Missing number in the Number Challenge ?

A) 8	B) 32
C) 44	D) 64

Answer & Explanation Answer: D) 64

Explanation:

The logic in the challenge is

$\sqrt{81} x 6 = 9 x 6 = 54$

$\sqrt{144} x 7 = 84$

Similarly, $\sqrt{64} x 8 = 8 x 8 = 64$ .

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Filed Under: Math Puzzles
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22 10148

Q:

If a+b+c =21 what is the total number of positive integral solutions?

A) 109	B) 190
C) 901	D) 910

Answer & Explanation Answer: B) 190

Explanation:

Number of positive integral solutions = $n - 1_{C_{r - 1}}$ = ${}^{20}C_{2}$ = 190

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Filed Under: Permutations and Combinations
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6 10141

Q:

The calendar for the year 2020 will be the same for the year

A) 2040	B) 2076
C) 2096	D) 2044

Answer & Explanation Answer: D) 2044

Explanation:

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Filed Under: Calendar
Exam Prep: Bank Exams

63 10137

Q:

Two vessel P and Q contain milk and water in ratio 3 : 2 and 5 : 3 respectively. If 10 liters of the mixture is removed from vessels P and poured in vessel Q then ratio of milk to water in vessel Q becomes 8 : 5. Find the initial quantity of water in vessel Q.

A) 10 lit	B) 6 lit
C) 16 lit	D) 12 lit

Answer & Explanation Answer: A) 10 lit

Explanation:

Given ratio of initial mixture of milk and water in Q = 5 : 3

Let the initial quantity of mixture in vessel Q = 8x

Let quantity of Milk = 5x and

Let quantity of water = 3x

According to the question,

$\frac{5 x + 10 x \frac{3}{5}}{3 x + 10 x \frac{2}{5}} = \frac{8}{5}$

=> 25x + 30 = 24x + 32

=> x = 2

Required Initial quantity of milk = 5x = 5 x 2 = 10 lit.

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Filed Under: Ratios and Proportions
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18 10135

Q:

Which of the following is the largest unit of storage?

A) GB	B) KB
C) MB	D) TB

Answer & Explanation Answer: D) TB

Explanation:

The storage capacity is measured in bytes, kilo bytes, mega bytes, giga bytes and tera bytes. The largest unit of storage is Tera bytes.

Which_of_the_following_is_the_largest_unit_of_storage1552389085.png image

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Filed Under: Computer
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16 10134

Q:

Refer the below data table and answer the following question.

If 400 calories are burned by jogging 5 km, how many calories are burnt in the given week?

A) 1690 calories	B) 1590 calories
C) 1540 calories	D) 1640 calories

Answer & Explanation Answer: B) 1590 calories

Explanation:

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Filed Under: Table Charts
Exam Prep: Bank Exams

0 10134

Q:

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at :

A) 518 nm	B) 1035 nm
C) 325 nm	D) 743 nm

Answer & Explanation Answer: D) 743 nm

Explanation:

$\frac{1}{λ} = \frac{1}{λ 1} + \frac{1}{λ 2}$

$\frac{1}{355} = \frac{1}{680} + \frac{1}{λ 2}$

$\frac{1}{λ 2} = \frac{680 - 355}{680 \times 355}$

$\Rightarrow λ 2 = 743 n m$ .

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Filed Under: Chemistry
Exam Prep: AIEEE

12 10128

Q:

In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons are there in the family ?

A) 1	B) 2
C) 3	D) 4

Answer & Explanation Answer: C) 3

Explanation:

Assume the family has X girls and Y boys, according to the question,
we can have 2 equations:
X-1=Y, 2(Y-2)=X.
Solve the equations, we get X=4, Y=3.

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Filed Under: Arithmetical Reasoning
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18 10124

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