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A Prime number is only divisible by 1 and itself.

If all three digits have to be used then any number formed from them is divisible by 9 as the sum of the digits = 9. Thus no prime number can be formed.

If only two of the three digits are used then it cannot end in 0 or 8 as it would be divisible by 2. This only leaves 81 where the digits again total 9 and thus is divisible by 9.

None of the single digits 0,1,8 are prime. 8 is an even number. 1 is classed as unity, 0 is zero.

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Q: Can you make a prime number from the numbers 1 0 8?
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