RRB NTPC Mains or Stage 2 Model Paper 8 with solutions

Question : 43 of 120

Marks: +1, -0

12 : 30 : : 20:?

Solution:

(d)

12 = 3^2 + 3,

30 = 5^2 + 5 :

20 = 4^2 + 4 :

? = 6^2 + 6

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