No other multiples of 5 are primes. Keep going with the other primes ... You should end up with a list of 25 prime numbers between 1 and 100. These are shown in the grid below.
A multiple is a number multiplied. So 20, 30 and 40 are multiples of 10. A factor is any number that is evenly divided into another. For example, 2 and 5 are both factors of 10.
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