Question

What is the missing number in the following grid?
9,2,22
3,7,20
11,?,36

Answer 1

Answer:

7

Step-by-step explanation:

i ) Let a = 9 , b = 2 , c = 22

2( a + b ) = c

⇒ 2( 9 + 2 ) = 22

ii ) a = 3 , b =7 , c = 20

2( a + b ) = 2( 3 + 7 ) = 20

iii ) a = 11 , let b = x , c = 36

2( 11 + x ) = 36

⇒ 11 + x = 36/2

⇒ 11 + x = 18

⇒ x = 18 -11

∴ x = 7

Missing number = 7

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