Which of the following sums can be represented as a terminating decimal?

Answer Choices

Correct answer marked below

1/30 + 1/42

1/250 + 1/1,500

1/12,000 + 1/15,000

1/90 + 1/42

1/80 + 1/10

Correct

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Explanation

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Official Explanation

Official

A fraction is considered to be terminating if, in its simplest form, the denominator contains no prime factors other than 2 and 5.

A. 1/30 + 1/42 --- 1/42 has a prime factor of 7 in the denominator.

B. 1/250 + 1/1,500 --- 1/250 has a prime factor of 5, but 1/1,500 has a prime factor of 3 in the denominator.…

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Comments

ArjunMay 7, 2024

Amazing

NathanNov 22, 2024

thank you very much!

What this question tests

What it tests

Your ability to convert between fractions, ratios, and decimals and to reason proportionally.

Common trap

Cross-multiplying incorrectly or mixing up the ratio parts — a part:part ratio is not a fraction of the whole.