Odd Number Puzzle Solution - 18 July
Can you find the odd number in the following?
2716, 4135, 5321 and 7145
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Solution2716 is the odd one out.
This is because the rest of the numbers add up to be a prime number.
4 + 1 + 3 + 5 = 13
5 + 3 + 2 + 1 = 11
7 + 1 + 4 + 5 = 17
However, in the case of 2716,
2 + 7 + 1 + 6 = 16 which is not a prime number.
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