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40 Winks
The average person spends 229 961 hours of their life asleep.
That's about 9582 days, or 26 years!
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Hypotenuse
The word hypotenuse comes from the Greek hypoteinousa, which means 'stretching under'.
The hypotenuse is the side that stretches under the right-angle in a right-angled triangle.
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What's bigger when it's upside down?
6
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Acute Angle
An angle which is less than 90° is called an acute angle.
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Best Selling
For a recording artist to be awarded a gold record, they must sell 500 000 copies.
For a platinum record, they must sell 1 000 000 copies.
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Why should you take a mathematician camping with you?
Because they always come prepared with a pair of axes.
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24K Gold
24K gold means pure gold.
18K gold is 75% gold (18 ÷ 24 × 100 = 75), meaning that 25% of it is actually other metal (often silver or copper).
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Blink and You'll Miss It
The average person blinks 28 800 times a day!
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Reflex Angle
An angle which is greater than 180° but less than 360° is called a reflex angle.