Question

Find all prime numbers between 40 and 70, and whose sums of the digits is 7​

Answer 1

43, 61

Explanation:

All prime number between 40 and 70 are: 41, 43, 47, 53, 59, 61, 67

43 and 61 are the only numbers that works.

4+3=7 and 6+1=7

Answer 2

43.

Explanation:

All the prime numbers between 40 and 70 are

41 43 47 53 59 61 67

43 gives a sum of 7.