Dice are cubes where the sum of the numbers on the opposite faces is 7. Find the missing numbers a, b and c.

It is given that the sum of the numbers on the opposite faces is 7.

So, c + 4 = 7

⇒ c = 7 - 4

⇒ c = 3

And, 5 + a = 7

⇒ a = 7 - 5

⇒ a = 2

And, 6 + b = 7

⇒ b = 7 - 6

⇒ b = 1

Hence, the values are a = 2, b = 1 and c = 3.