Question

Two positions of a dice are shown below: When $2$ is at the bottom, what number will be at the top?

• A. $6$
• B. $4$
• C. $1$
• D. $5$

Answer 1

The correct option is C $1$

Number $3$ is common to both the figures (i) and (ii). The dice in fig. (ii) is assumed to be rotated so that $3$ remains on the FR-RH face (i.e. face I as per activity $1$) and the numbers $5$ and $2$ move to the faces hidden behind the numbers $6$ and $1$ respectively [in fig. (i)]. Thus, the combined figure will have $3$ on FR-RH face (i.e. face I), $5$ on RR-RH face (i.e. face II), $2$ on Bottom face (i.e. face VI), $1$ on the Top face (i.e. face V) and $6$ on FR-LH face (i.e. face IV). Clearly, $2$ lies opposite $1$. Hence, when $2$ is at the bottom, then $1$ will be at the top.