Discussion
The sum of three consecutive multiples of 3 is 72. What is the largest of the three numbers?
Answer: C
Let the three consecutive multiples of 3 be 3x, 3(x+1), and 3(x+2). A simpler way is to let them be n-3, n, n+3, where n is the middle number. Their sum is 3n = 72, so n=24.
The numbers are 21, 24, and 27.
The largest number is 27.
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