Sign in
Please select an account to continue using cracku.in
↓ →
63 is the only number in the group of given numbers that is not prime.
71, 23, 17, 13, all of them are prime numbers.
Create a FREE account and get:
Book Free CAT Mentorship
Get personalized CAT strategy from a 99%iler
500+ students mentored
OTP Verification
Enter the 6-digit code sent to your phone
Booking Summary
Enter OTP
Didn't receive the OTP?
Enroll in Cracku's CUET PG 2026 coaching now
Educational materials for CAT preparation