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Reasoning

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Data Sufficiency

Question
4 out of 30
 

Is it 9 o’clock now?

I. after half an hour, the minute and the hour hands of the clock will make an angle of exactly 90° with each other.

II. exactly 15 minutes ago, the hour and the minute hands of the clock coincided with each other.



A If data in statement I alone are sufficient to answer the question, while the data in statement II alone are not sufficient to answer the question.

B If data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.

C If the data either in statement I alone or in statement II alone are sufficient to answer the question.

D If the data even in both statements I and II together are not sufficient to answer the question.

E If the data in both statements I and II together are necessary to answer the question.

Ans. C

using statement I

If the time is 9 o’clock now then after 30 minute i.e. at 9:30 the angle between the minute hand and hour hand cannot be 90°. So, now the time is 9 o’clock.

Using statement II

If the time now is 9 o’clock then 15 min before the hour and minute hand of the clock can never coincide with each other. Instead they will have an angle of 7.5°. so, the time now is not 9 o’clock.

Data Sufficiency Flashcard List

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