6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The size of the wooden block is 5 x 10 x 20 cm .How many such blocks will be required to construct a solid wooden cube of minimum size?

A) 6	B) 8
C) 12	D) 16

Answer & Explanation Answer: B) 8

Explanation:

Side of smallest cube = L.C.M of 5, 10, 20 = 20cm

Volume of the cube = (20 x 20 x 20)cu.cm = 8000 cu.cm

Volume of the block= (5 x 10 x 20)cu.cm = 1000 cu.cm

Number of blocks = (8000/1000) = 8

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams
Job Role: Bank PO

35 19348

Q:

In measuring the sides of a rectangle, one side is taken 5% in excess and the other 4% in deficit. Find the error percent in the area, calculate from the those measurements.

A) .7%	B) 0.8%
C) 0.9%	D) 0.3%

Answer & Explanation Answer: B) 0.8%

Explanation:

let x and y be the sides of the rectangle then

correct area = $\frac{105}{100} x \times \frac{96}{100} y$

Error% = $\frac{504}{500} x y - x y = \frac{4}{500} x y$ %

$\frac{4}{500} x y \times \frac{1}{x y} \times 100 = \frac{4}{5} = 0.8$

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

11 19344

Q:

What will come in place of the question mark (?) in the following number series?

3240, 540, 108, 27, ?, 4.5

A) 7	B) 10
C) 9	D) 8

Answer & Explanation Answer: C) 9

Explanation:

Ans.
540 = 3240/6
108 = 540/5
27 = 108/4
? = 27/3, i.e. ? = 9

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Filed Under: Numbers
Exam Prep: AIEEE , Bank Exams , GATE

1 19329

Q:

Which of the following statement is CORRECT about the tangents?

A) The tangents drawn at the end of diameter of a circle are parallel to each other.	B) The line segment which joins the point of contact of two parallel tangents to the circle is the diameter of the circle.
C) Tangents drawn from the external points subtends equal angle at the center.	D) All option are correct.

Answer & Explanation Answer: D) All option are correct.

Explanation:

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

1 19322

Q:

A tailor has 37.5 metres of cloth and he has to make 8 pieces out of a metre of cloth. How many pieces can he make out this cloth ?

A) 300	B) 360
C) 400	D) 450

Answer & Explanation Answer: A) 300

Explanation:

Length of each piece = (1/8) m = 0.125 m

Required no of pieces = (37.5/0.125) = (375 * 100) / 125 = 300.

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Filed Under: Decimal Fractions

36 19298

Q:

A person sold two cows each for Rs.9900. If he gained 10% on one and lost 20% on the other, then which of the following is true?

A) He Gained Rs. 200	B) He lost Rs. 200
C) He neither gained nor lost	D) None of the above

Answer & Explanation Answer: D) None of the above

Explanation:

The CP of profitable cow = 9900/1.1 = 9000

and profit = Rs. 900

The CP of loss yielding cow = 9900/0.8 = 12375

and loss = Rs. 2475

so, the net loss = 2475 - 900 = 1575

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Filed Under: Profit and Loss
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

26 19262

Q:

What is the measure of an exterior angle of a regular polygon of 6 sides?

A) 45 deg	B) 60 deg
C) 40 deg	D) 36 deg

Answer & Explanation Answer: B) 60 deg

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

0 19258

Q:

The simple interest at y% for 'y' years will be Rs. y on a sum. Find the principal amount.

A) 100/y	B) 100 x y
C) 100y2	D) 100 ÷ y2

Quantitative Aptitude - Arithmetic Ability Questions

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