RRB Junior Engineer Stage 1 Model Papers 1

Question : 31 of 100

Marks: +1, -0

7, 2 = 59; 5, 3 = 28; 9, 1 = 810; 2, 1 = 13; 5, 4 = ?

Solution:

7 – 2 = 5; 7 + 2 = 9

⇒ 7, 2 = 59

5 – 3 = 2; 5 + 3 = 8

⇒ 5, 3 = 28

9 – 1 = 8; 9 + 1 = 10

⇒ 9, 1 = 810

2 – 1 = 1; 2 + 1 = 3

⇒ 2, 1 = 13
Therefore,

5 – 4 = 1; 5 + 4 = 9

⇒ 5, 4 = 19

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