Question

What needs to be added to the sum of the first three prime numbers to equal the fifth?

Answer 1

sum of first 3 primes :
2+3+5=10.
5th prime=11
11-10=1
∴1 is the number which when added to the sum of first 3 primes gives the fifth prime.

hope it helps and pls mark this as best answer

Answer 2

sum of first 3 prime nos. 1+2+3=6
5th prime no.=7
no to be added=7-6=1
1 should be added