Multiple choice

At what time will a right angle be formed by the two hands in a clock before 10 O’clock?

  1. Data inadequate

  2. 9:00

  3. will not be formed

  4. 9:30

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A right angle (90 degrees) is formed when the hour and minute hands are 15 minutes apart. Before 10 o'clock, the two right angles occur at approximately 9:00 and 9:33. The question asks for 'before 10 O'clock' and 9:00 is one of the exact times when a right angle is formed.

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