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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.
Puzzle 19
What is represented by this BrainBat?
[Ref: ZJZO]
Hint: Say what you see.
Answer: Top hat.
Puzzle 20
Can you draw this diagram in one continuous line, without crossing any lines, retracing your steps, or lifting your pen from the paper?
[Ref: ZQEA]
Hint: Try using paper and pen.
Answer:
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