Question

Find the number of all prime numbers less than 55?

• A. 17
• B. 18
• C. 16
• D. 15

Answer 1

Answer:

C. 16

prime numbers less than 55 are From 1 to 10 prime numbers are = 4 11 to 20 = 4 20 to 30 = 2 30 to 40 = 2 40 to 50 = 3 50 to 55 = 1 total = 4 + 4+ 2+ 2 +3 + 1=16