100+ Decimal Fraction Questions & Answers for Competitive Exams - 1

Question: 1

0.04 × 0.0162 is equal to

(A) 6.48 × 10-2

(B) 6.48 × 10-3

(C) 6.48 × 10-4

(D) 6.48 × 10-5

Ans: C

4 × 162 = 648.

Sum of decimal places = 6.

∴ 0.04 × 0.0162 = 0.000648 = 6.48 × 10-4

Question: 2

$${25.025} / {0.025}$$ is equal to

(A) 10.1

(B) 101

(C) 1001

(D) 10001

Ans: C

$${25.025} / {0.025}$$ = $${25025}/{25}$$ = 1001.

Question: 3

$${.625 × .0729 × 28.9} /{ .0081 × .025 × 1.7}$$ = ?

(A) 3625

(B) 3725

(C) 3825

(D) 382.5

Ans: C

Given expression = $${625 × 729 × 289} / {81 × 25 × 17$$ = 3825.

Question: 4

$${3.5 × 1.4} / {0.7}$$ = ?

(A) 0.7

(B) 7

(C) 7.1

(D) 7.4

Ans: B

Given expression = $${35 × 1.4} / {7}$$ = 5 × 1.4 = 7.

Question: 5

0.5 × 0.5 + 0.5 ÷ 5 is equal to

(A) 0.15

(B) 0.25

(C) 0.35

(D) 0.65

Ans: C

Given expression = $$0.5 × 0.5 + {0.5} / {5}$$ = 0.25 + 0.1 = 0.35.

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