Including 1 and 100, the answer is 1 (with only one factor: 1)
Excluding 1 and 100, it is all prime numbers which have two factors each - 1 and themselves: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.
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When multiplying, the product is going to have the same number of significant digits as the least amount in the factors. So 8.08 has three significant digits and 5.232 has four significant digits. Remember that any zeros in-between significant digits is always significant. Because the least amount of sig digs in the factors is three (from 8.08), the product is going to have three sig digs.Multiplying out normally: 8.08 × 5.232 = 42.27456Rounded to three places: 42.3
A composite number is a number that has at least 3 factors. (It can be evenly divided by at least 3 number.) 25 has 3 factors: 1, 5, and 25.
It is 97 which has only two factors because it is a prime number
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100.....1,2,4,5,10,20,25,50,100