100+ Decimal Fraction Aptitude Questions and Answers - 2

Question: 6

The value of (4.7 × 13.26 + 9.43 + 4.7 × 77.31) is

(A) 47

(B) 470

(C) 4700

(D) 47000

Ans: B

Given expression = 4.7 × (13.26 + 9.43 + 77.31) = 4.7 × 100 = 470.

Question: 7

The value of $${42} / {10000}$$ in decimal fraction is

(A) .42

(B) .0042

(C) .00042

(D) .420

Ans: B

$${42}/{10000}$$ = .0042.

Question: 8

11.71 – 0.86 + 1.78 – 9.20 = ?

(A) 2.43

(B) 2.45

(C) 3.13

(D) 3.43

Ans: D

Given expression

= (11.71 + 1.78) – (0.86 + 9.20) = 13.49 – 10.06 = 3.43.

Question: 9

The number 518,000,000 when expressed in scientific notation, equals

(A) 51.8 × 106

(B) 51.8 × 107

(C) 5 1.8 × 108

(D) 5.18 × 109

Ans: C

518,000,000 = 5.18 × 100000000 = 51.8 × 108

Question: 10

How many digits will be there to the right of the decimal point in the product of 95.75 and .02554?

(A) 5

(B) 6

(C) 7

(D) 8

Ans: B

Sum of decimal places = 7.

Since the last digit to the extreme right will be zero

(∴ 5 × 4 = 20), so there will be 6 significant digits to the right of the decimal point.

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