A two-digit number, 9A, is a prime number. Find A.
A. 9
B. 7
C. 3
D. 1
Answer: Option B
Solution (By Examveda Team)
9A is prime number then by option, 9AOption A: A = 9, Number = 99 → Composite
Option B: A = 7, Number = 97 → Prime
Option C: A = 3, Number = 93 → Composite
Option D: A = 1, Number = 91 → Composite
This Question Belongs to Arithmetic Ability >> Number System
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