**Odd Number Puzzle Solution - 18 July**
Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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**Solution**2716 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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