Question

Find the value of (?)
2 5 4
3 4 3
7 36 2
15 18 ?
1. 10
2. 11
3. 12
4. 13

Answer 1

•Given:-

2 5 4

3 4 3

7 36 2

• To find:- 15 18 ?

• Solution:- According to the series ,the format is

the sum of the elements of first number of this series+ the sum of the elements of third number of this series -1 = sum of the elements of second number

so,4+5-1=6

and then

the sum of the elements of first number of this series+the sum of the elements of third number of this series-1-1= sum of the elements of second number

so 3+3-1-1=4

then

the sum of the elements of first number of the series+the sum of the elements of third number of this series -1+1= sum of the elements of second number

so, 7+2-1+1= 3+6= 9

then the series would be

the sum of first number of this series+the sum of third number of this series-1+2= sum of the elements of second number= 9

so, 5+1+ X -1+2 = 9 (let X is the sum of third number)

so,X= 2

so the final answer is 11 because ( 1+1=2)