Daily Archives: April 16, 2017

DAY 107:

Today’s Challenge Here’s seven tricky mental teasers to try: (18 – 5) – (7 – 17) = ? 128 + 294 = ? How many seconds are in a quarter-of-an-hour? How many degrees are in three-quarters of a circle? (16 – 8) × (13 – 8) … Continue reading

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