Question

Find the number of zeros at the right end of 300! - 100!

• A. 25
• B. 20
• C. 24
• D. 19

Answer 1

Answer:

C. 24

While subtracting two numbers, the numbers of zeros will depend on the number with lesser number of zeros. The number of zeroes at the end of 100! will be less than the number of zeroes at the end of 300! number of zeros at the right end of 100! = power of 5 in 100! divide 100 by 5 No. of zeroes = Sum of all quotient. Divide divisor by 5 and add the respective quotient. 100 ÷ 5 = 20. 20 ÷ 5 = 4. No. of zeroes = 24