Four usual dice are thrown on the ground The total of numbers on the top faces of these four dice is...........

Logical Reasoning(Master ) Cubes and Dice

Four usual dice are thrown on the ground. The total of numbers on the top faces of these four dice is 13 as the top faces showed 4, 3, 1 and 5 respectively. What is the total of the faces touching the ground?

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Explanation:

In a usual dice, the sum of the numbers on any two opposite faces is always 7.
Thus, 1 is opposite 6, 2 is opposite 5 and 3 is opposite 4.
Consequently, when 4, 3, 1 and 5 are the numbers on the top faces,
then 3, 4, 6 and 2 respectively are the numbers on the face touching the ground.
The total of these numbers = 3 + 4 + 6 + 2 = 15.