Exactly how many minutes is it before eight o'clock if...
...40 minutes ago, it was three times as many minutes past four o'clock?
Puzzle Copyright © Kevin Stone
Hint: How many minutes are between the times?
Answer: 50 minutes.
Between four o'clock and eight o'clock we have 240 minutes.
In these 240 minutes we have 4 lots of the unknown time (t) and 40 minutes.
Therefore 240 = 4 x t + 40.
Therefore t = 50 minutes.
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