Technique 1: (Simple drawing)
First you can follow a very simple method. Take a rubber (cuboid or cube shape) with you in the exam hall. Try writing up the numbers as they have been put in the question figure. You have the answer on that rubber in front of you.
Technique 2: (Logic)
To see logically, If we check the first two cubes, the common number 1 has numbers 4, 6, 2 and 3 on its four adjacent faces. So the remaining number 5 is on the opposite face of 1. .........Statement 1 (S1)
See the 4th cube. Here we need to find two adjacent numbers of 5.
Method I:
Looking at it in other way, (from statement 1) it can be said that, 2,3,4 and 6 are the adjacent numbers of 5. So out of all, only (a) is possible.
Method II
If you see statement (1) itself, you can eliminate three answer options.
- Number 1 should not be an adjacent number of 5 because it is the opposite number of 5 (from statement (1)) .
- So answer options (b),(c) and (d) can be eliminated as each of these options have 1 as one of its two numbers.