Find out missing number. ? 13 49 9 17 69 13 11 59

BA LLB Banaras Hindu University 2016 Solved Paper

Question : 10 of 170

Marks: +1, -0

Find out missing number.

Solution:

In 3rd row,

13 × 2+11 × 3=59

2nd row,

9 × 2+17 × 3=69

Similarly, 1st row,

x × 2+13 × 3=49

⇒2 x+39 =49

⇒2 x=10

⇒ x=5

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