Which of the following numbers is a perfect square?

B. 64
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What is the product of the first five positive integers?

A. 120
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If x is a positive integer such that 3x + 5 = 26, what is the value of x?

A. 7
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What is the result of 7^2 - 4^2?

A. 33
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What is the sum of the first 10 positive integers?

C. 55
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