Prime number divided by 5 puzzle
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Can you find out how many prime numbers that are less than 95 will leave an odd reminder when divided by 5?
13
The numbers are 3, 11, 13, 23, 31, 41, 43, 53, 61, 71, 73, 83, 91
Only the numbers that end in 1, 3 will have odd remainder so we need to only check the prime numbers which end in 1 and 3
Your Answer
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