Question

Q.4 The sum of three consecutive odd natural numbers is 69. Find the prime number out of these numbers.

plz tell me ​

Answer 1

Answer :-

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.

so therefore our required answer is 23

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Answer 2

Let us assume three consecutive odd numbers of series be
x, x+2 and x+4
So, the sum of the consecutive odd numbers is

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 the prime number among these three is 23.