Cubes and Dice

Q1: Two positions of a block are given below. When 1 is at the top, which number will be at the bottom?

A 2

B 3

C 4

D 6

ANS:A - 2

Explanation: Number 2 is common to the two positions of the dice. We assume the dice in fig. (ii) to be rotated so that 2 remains on the top face (i.e. face V as per activity 1) and the numbers 3 and 6 move to the faces hidden behind 5 and 1 respectively [in fig. (i)]. Then, clearly, 5 lies opposite 3 and 6 lies opposite 1. Hence, when 1 is at the top, then 6 will be at the bottom.



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