Question

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. $6$

Answer 1

The correct option is D $6$

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.