Two positions of the same cubical block are shown. When '6' is at the top, which number will be at the bottom?

Answer & explanation
Correct answer: option 1
Step 1) In figure Ist and IInd, 4 is common
Step 2) The number ‘4’ is common in both the dice, but it is at a different position. In order to find out, the number appearing on the opposite face, rotate the dice in a clockwise direction with the common number as the reference.
Step 3)
4 5 2
4 3 1
Step 4) 5 is opposite to 3
2 is opposite to 1
Therefore ,
6 will be opposite to 4