RRB Junior Engineer / DMS / CMA 2015 · Question 55 of 480

The numbers in each group are related in a certain way. Choose the correct number from among the alternatives that will replace the question mark. (3 [34] 5)(4 [65]7) (6[?]9)

Reasoning - Number Analogy

Aa. 85
Bb. 107
Cc. 11 7Correct
Dd. 128

Answer: C. c. 11 7

Explanation

As, 3x5 = 15x2 +(5-3)2 = 30+ 4 = 34 and, 4x7 =28x2 +(7-4)2 = 56+ 9 = 65 Similarly, 6x9 = 54x2 + (9 -6)2 = 108+9 = 117

Source: Arihant RRB JE Solved Paper 26-Aug-2015 (3rd Shift), Q91–150 — published solved-paper compilation (Q1–90 technical not included in this source) · memory-based

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