Learn the 14 times table. Build from 7s and doubles, use patterns, and check with inverse division to speed up KS3 maths.
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28 is the sum of the first non negative integers (1 + 2 + 3 + 4 + 5 + 6 + 7 = 28), a sum of the first primes (2 + 3 + 5 + 7 + 11 = 28) and a sum of the first non primes (1 + 4 + 6 + 8 + 9 = 28)
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First work out 20 x 14 = 280 then subtract 14
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14 is the square root of 196
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56 is the sum of six consecutive primes: 3 + 5 + 7 + 11 + 13 + 17 = 56
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To multiply any number by 10 simply put a zero on its end
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There are 168 hours in a week (7 x 24 = 168)
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2 x 14 = 28 so 20 x 14 = 280
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In Roman numerals 238 is written as CCXXXVIII
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5 x 14 = 70 and 70 + 14 = 84
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182 has 8 factors: 1, 2, 7, 13, 14, 26, 91 and 182
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