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Discussion :: Cubes and Dice

  1. Two positions of a dice are shown below. Identify the number at the bottom when the top is '3'?

  2. A.
    2
    B.
    4
    C.
    5
    D.
    6

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    Answer : Option C

    Explanation :

    The number 6 is common to both the positions of the dice. We assume the dice in fig. (ii) to be rotated so that 6 remains on the FR-LH face (i. e. on face IV as per activity 1) and the numbers 1 and 3 move to the faces hidden behind 4 and 5 respectively [in fig. (i)]. Then, 5 lies on FR-RH face (i.e. face I), 4 lies on Top face {i.e. face V), 3 lies on RR-LH face (i.e. face III) and 1 lies on Bottom face (i.e. face VI). Thus, 3 lies opposite 5. Hence, when the top is 3, then the number at the bottom is 5.


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