Question

In the following question, there are two sets of three numbers which are related to each other in some way. Choose a set of numbers from the four alternatives given below, which is similar to the given set.

Given sets: $(21,51,15),(10,50,20)$

• A. $(21,30,51)$
• B. $(21,35,41)$
• C. $(31,51,42)$
• D. $(21,91,35)$

Answer 1

The correct option is D $(21,91,35)$

In each set $2^{nd}$ number $=1^{st}$ number $+2\times 3^{rd}$ number.
$51=21+15\times 2$
$50=10+20\times 2$

Therefore,

only D: $91=21+35\times 2$, satisfies the given condition.