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x < 7
Suppose the number is x. Then the inequality is: x - 7 < 5 which is equivalent to x < 12
16
Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7
The prime numbers less than 10 are 2, 3, 5, and 7. There are several possibilities for the answer to this question since we do not know how many prime factors there are. We know that all of them are less than 10 and they do not repeat. However, we do not know whether the prime factors are all of the the prime numbers less than 10 or a selection of them. Possibilities: 2 x 3 = 6 2 x 5 = 10 2 x 7 = 14 3 x 5 = 15 3 x 7 = 21 5 x 7 = 35 2 x 3 x 5 = 30 2 x 3 x 7 = 42 2 x 5 x 7 = 70 3 x 5 x 7 = 105 2 x 3 x 5 x 7 = 210