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There are only 9 numbers between 80 and 90 - so lets look at them all

Remember we only need to find 1 number that will divide the number except for 1 and itself for it to be NON-PRIME.

81 - 3 will of course divide this number - so not prime.

82 - 2 will of course divide this number - so not prime.

83 - PRIME!!!

84 - 3 will of course divide this number - so not prime.

85 - 5 will of course divide this number - so not prime.

86 - 2 will of course divide this number - so not prime.

87 - 3 will of course divide this number - so not prime.

88 - 2 will of course divide this number - so not prime.

89 - PRIME!!!

So, the only numbers between 80 and 90 that are primes are 83 and 89!

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15y ago

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