Question

The sum of thirteen consecutive whole numbers is 1339. What is the sum of prime numbers among these numbers ?

Answer 1

Step-by-step explanation:

Let us assume three consecutive odd numbers of series be: x,x+2 and x+4

So, the sum of the consecutive odd numbers = x+x+2+x+4=69

⇒3x+6=69

⇒3x=69−6

⇒3x=63

x=21

Therefore, three consecutive odd numbers are,

x=21

x+2=21+2=23

x+4=21+4=25

So, prime number among these three is 23.