How many prime numbers are less than 50?

Given data

• List primes below 50 and count them.

Concept / Approach

• Primes below 50 can be enumerated or found by sieving.

Enumeration

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47Count = 15

Common pitfalls

• Including 1 or 49 (7²) by mistake.

Final Answer

15