UPSC Prelims 2020 · CSAT (Paper 2) · Q10
Basic Numeracy
Medium · Primes from digit permutations
How many five-digit prime numbers can be obtained by using all the digits 1, 2, 3, 7 and 8 without repetition of digits?
UPSC Prelims 2020 · CSAT (Paper 2) · Q10
Medium · Primes from digit permutations
How many five-digit prime numbers can be obtained by using all the digits 1, 2, 3, 7 and 8 without repetition of digits?