What is the least common multiple (LCM) of 12 and 15?

B. 60
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If x is a positive integer such that 3x + 7 = 28, what is the value of x?

A. 5
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Which of the following numbers is a prime number?

B. 29
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What is the result of 7 squared minus 3 cubed?

A. 34
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What is the sum of the first 10 positive integers?

C. 55
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