Brain Teasers
More Mad Ade Clocks, Again!
Mad Ade took a final look at his clock before setting off out to purchase a fine salad-free kebab from the Sweaty Chef Kebab Shop. The time said 8:00 pm.
When he arrived at the Sweaty Chef's, he noticed two important facts:
A, The time on the clock in the shop said 8:05 pm
B, He had forgotten his wallet.
Mad Ade immediately set off home. On his return home, he noticed the clock in his house said 8:18 pm.
Now, assuming Mad Ade's walking speed was uniform in both directions, how many minutes faster than The Sweaty Chef's clock was Mad Ade's?
When he arrived at the Sweaty Chef's, he noticed two important facts:
A, The time on the clock in the shop said 8:05 pm
B, He had forgotten his wallet.
Mad Ade immediately set off home. On his return home, he noticed the clock in his house said 8:18 pm.
Now, assuming Mad Ade's walking speed was uniform in both directions, how many minutes faster than The Sweaty Chef's clock was Mad Ade's?
Answer
The actual time spent walking for Mad Ade is the difference between 8:00 and 8:18 using Mad Ade's clock, making each trip nine minutes long. As the clock at the Sweaty Chef read 8:05 when Mad Ade arrived, and he set off at 8:00 according to his own clock, the difference is four minutes.So the real time when Mad Ade left home was 7:56, and not 8:00.
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