100+ Decimal Fraction Aptitude Questions and Answers - 2

 Question: 1

The product of 0.09 and 0.007 is

(A) 0.00063

(B) 0.00630

(C) 0.6300

(D) 0.000063

View Answer

Ans: A

9 × 7 = 63.

Sum of decimal places = 5

∴ 0.09 × 0.007 = 0.00063.

Question: 2

29.92 × 2.4 + 21.28 × 4.5 = ?

(A) 147.568

(B) 167.568

(C) 167.658

(D) 176.568

View Answer

Ans: B

Given expression = 71.808 + 95.76 = 167.568.

Question: 3

(0.75 × 4.4 × 2.4) ÷ 0.6 = ?

(A) 11

(B) 12

(C) 13

(D) 13.2

View Answer

Ans: D

Given expression = 7.92 ÷ 0.6 = 79.2 ÷ 6 = 13.2.

Question: 4

Terry consumes 1600 ml of milk everyday. How many litres of milk she consume in 4 weeks?

(A) 41.6

(B) 43.3

(C) 44.8

(D) 48.2

View Answer

Ans: C

Daily consumption = 1600 ml = 1.6 litres.

Consumption in 4 weeks = (1.6 × 4 × 7) litres = 44.8 litres.

Question: 5

54.327 × 357.2 × 0.0057 is the same as

(A) 5.4327 × 3.572 × 0.57

(B) 5.4327 × 3.572 × 5.7

(C) 54327 × 3572 × 0.0000057

(D) None of these

View Answer

Ans: B

Number of decimal places in the given expression = 8.

Number of decimal places in (a) = 8.

Number of decimal places in (b) = 9.

Number of decimal places in (c) = 7.

Clearly, the expression in (a) is the same as the given expression

Question: 6

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

(A) 47

(B) 470

(C) 4700

(D) 47000

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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.