Question

The sum of 3 consecutive numbers odd numbrs arw 21 find the nujmber numgr

Answer 1

Answer :

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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Answer 2

Answer:

The numbers are 5 , 7 and 9

Step-by-step explanation:

Let the consecutive numbers be a - d, a and a + d

The numbers are odd so the difference (d) is 2

According to the given condition

a - d + a + a + d = 21

3a = 21

a = 7

So the terms are

a - d i.e. 7 - 2 = 5

a i.e. = 7

and a + d i.e. 7 + 2 = 9

The numbers are 5, 7 ,9

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