Q58
How many twin primes are there in the numbers from 1 to 50 ?
- (1) 6
- (2) 5
- (3) 4
- (4) 7
CTET 8 Feb 2026 Paper 1, Question 58
Solution.
CBSE answer: (1)
Answer: (1) 6
- Twin primes are pairs of primes that differ by 2.
- From 1 to 50: (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43).
- That makes 6 pairs.
Trap: (2) 5 misses (3, 5) or (5, 7); 5 belongs to both pairs.