RRB RPF RPSF SI and CONS Model Papers 6 with solutions

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Directions (Q. 41–42): In each of the following questions, some equations are solved on the basis of a certain system. On the same basis, find out the correct answer for the unsolved equation.

Question : 42 of 120

Marks: +1, -0

2 × 3 = 49, 5 × 6 = 2536, 1 × 9 = 181, 4 × 7 = ?

1628
1649
2549
1219

Validate

Solution:

(2) As,

2 × 3=(2)^{2}(3)^{2}=(4)(9) ,

5 × 6=(5)^{2}(6)^{2}=(25)(36) ,

1 × 9=(1)^{2}(9)^{2}=(1)(81)

Similarly;

4 ×7=(4)^{2}(7)^{2}

=(16)(49)

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