Multiple choice

The sum of the squares of the prime numbers between 20 and 30 is

  1. 1570

  2. 1282

  3. 1370

  4. 1258

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Between 20 and 30, there are only two prime numbers 23 and 29. Therefore, 23 x 23 + 29 x 29 = 529 + 841 = 1370