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The sum of three consecutive numbers …

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The sum of three consecutive numbers is 21.Find each of them.

Posted by Bindia Jain 6 years, 5 months ago

CBSE > Class 07 > Mathematics

2 answers

Atharva Morankar 6 years, 5 months ago

6+7+8 = 21

0Thank You

Yogita Ingle 6 years, 5 months ago

Let one number be x.
Then, the other number will be x+2.
The third number = x+2+2 = x +4
It is given that their sum is 21.
So,
x + (x+2) + (x+4) = 21
= 3x + 6 = 21
= 3x = 15
x = 5
and x+2 = 7
x+4 = 9
Hence, the three consecutive odd numbers whose sum is 21 are 5, 7 and 9.

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CBSE > Class 07 > Mathematics