Question

9,16=7
4,36=8
121,81=20
25,49=?

Answer 1

12

Explanation:

√9 = 3 and √16 = 4

3 + 4 = 7

There is the same relationship in the second and third set of numbers.

so for 25,9 the answer is 5 + 7 = 12

Answer 2

12.

Explanation:

We have been given format of different numbers. We are asked to find the missing value for our given format.

`9,16=7`

Taking square root of 9 and 16 we will get,

`√(9)=3`

`√(16)=4`

`3+4=7`

Similarly, we can see that by taking the square root of all the on the left side of equation and adding them we get right side of equation.

`√(4)=2`

`√(36)=6`

`2+6=8`

`√(121)=11`

`√(81)=9`

`11+9=20`

Upon taking square root of 25 and 49 we will get,

`√(25)=5`

`√(49)=7`

`5+7=12`

Therefore, the missing number of our given sequence is 12.