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Calendars and Clocks · Question 59 of 65

Question 59

MediumOriginal question

A wall clock gains 20 seconds every hour. It is set right at 7 a.m. on Sunday. What will it show at 7 p.m. on Tuesday?

Options for question 59

Show the answer and explanation
CorrectNot quiteAnswer C

Correct answer: C

Explanation

  1. 7 a.m. Sunday to 7 a.m. Tuesday is 48 hours; to 7 p.m. Tuesday is 60 hours.

  2. Gain =60×20=1200= 60 \times 20 = 1200 seconds =20= 20 minutes.

  3. The clock shows 7:20 p.m.

Worth noting

7:16 p.m. counts only 48 hours (Sunday to Tuesday morning). 7:24 p.m. counts 72 hours.

Concept
Gain in seconds over several days
Typical time
75 s
Your time
—
The rule this testsClocks that gain or lose
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Ten questions from Calendars and Clocks, at your own pace.

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