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14p5=14*13*12*11*10 = 240240
Find the number of zeroes in the end of 160!
Determine the sum of the first 16 odd numbers.
A positive number becomes 34 times its reciprocal if 9 is subtracted from it. Find the number.
What is the smallest four-digit number that can be evenly divided by 20, 24, and 36?