Exams Questions and Answers

Q:

The sum of 3rd and 15th elements of an arithmetic progression is equal to the sum of 6th, 11th and 13th elements of the same progression. Then which element of the series should necessarily be equal to zero ?

A) 14th element	B) 9th element
C) 12th element	D) 7th element

Answer & Explanation Answer: C) 12th element

Explanation:

If we consider the third term to be ‘x”
The 15th term will be (x + 12d)
6th term will be (x + 3d)
11th term will be (x + 8d) and
13th term will be (x + 10d).
Thus, as per the given condition, 2x + 12d = 3x + 21d.Or x + 9d = 0.
x + 9d will be the 12th term.

Thus, 12th term of the A.P will be zero.

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Filed Under: Chain Rule
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35 12673

Q:

What is the measure of an exterior angle of a regular polygon of 5 sides?

A) 72	B) 60
C) 45	D) 40

Answer & Explanation Answer: A) 72

Explanation:

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

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Q:

In the following question, select the related word pair from the given alternatives.

Rose : Flower : : ? : ?

A) Six : Square	B) Tiger : Den
C) Lily : White	D) White : Colour

Answer & Explanation Answer: D) White : Colour

Explanation:

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Filed Under: Analogy
Exam Prep: Bank Exams

1 12669

Q:

Natural Rubber is a Polymer of

A) butadiene	B) 2methyl-1,3butadiene
C) ethylene	D) isoprene

Answer & Explanation Answer: D) isoprene

Explanation:

Natural Rubber is a Polymer derived from Isoprene.

rubber-bands-503028_6401547100511.jpg image

Natural rubber is an addition polymer that is obtained as a milky white fluid known as Latex from a Tropical Rubber Tree.

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Filed Under: Chemistry
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37 12662

Q:

In the following question, select the related number from the given alternatives.

56 : 51 : : 76 : ?

A) 71	B) 69
C) 73	D) 75

Answer & Explanation Answer: A) 71

Explanation:

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Filed Under: Analogy
Exam Prep: Bank Exams

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Q:

Time taken by P alone to finish a work is 50% more than the time taken by P and Q together. Q is thrice as efficient as R. If Q and R together can complete the work in 22.5 days, then how many days will P alone take to complete the work ?

A) 17 days	B) 11 days
C) 15 days	D) 16 days

Answer & Explanation Answer: C) 15 days

Explanation:

We know that Time is inversely proportional to Efficiency

Here given time ratio of P & P+Q as

P/P+Q = 150/100 = 3:2

Efficiency ratio of P & Q as

P:Q = 2:1 ....(1)

Given Efficiency ratio of Q & R as

Q:R = 3:1 ....(2)

From (1) & (2), we get

P:Q:R = 6:3:1

P alone can finish the work in

22.5(3+1)/6 = 15 days.

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Filed Under: Time and Work
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18 12657

Q:

Wheels of diameters 7cm and 14cm start rolling simultaneously from x & y which are 1980 cm apart towards each other in opposite directions. Both of them make the same number of revolutions per second. If both of them meet after 10seconds.The speed of the smaller wheel is

A) 22m/s	B) 33m/s
C) 44m/s	D) 55m/s

Answer & Explanation Answer: A) 22m/s

Explanation:

let each wheel make x revolutions per sec. Then $[(2 π * \frac{7}{2} * x) + (2 π * 7 * x)] * 10 = 1980$ $(2 * \frac{22}{7} * \frac{7}{2} * x) + (2 * \frac{22}{7} * \frac{7}{2} * x) = 198$

$66 x = 198$

distance moved by smaller wheel in 3 revolutions

= $2 * \frac{22}{7} * \frac{7}{2} * 3 = 66 c m$

speed of smaller wheel = $\frac{66}{3}$ m/s = 22m/s

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Filed Under: Area
Exam Prep: Bank Exams
Job Role: Bank PO

5 12654

Q:

Read the data given and answer the following questions

In a class of 60 students:

42 like Maths,

32 like English,

12 like neither Maths nor English

How many students like both Maths and English?

A) 28	B) 26
C) 16	D) 12

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