Six numbers, 21, 22, 23, 24, 25 and 26 are written on different faces of a dice. Three positions of this dice are shown here. Find the number on the face opposite 21.

Logic: In these types of dice problems, we should write all three numbers in clockwise or anticlockwise from a fix common number.

26 is common in first and second positions

From first and second positions,

So, 24 is on opposite face of 21.

Thus, option A is correct.