Three children take the stage of a large theater with a large number drawn on the front of their shirt.
The numbers they have drawn are respectively 1, 3 and 6.
They face the public and ask to be placed so that the resulting three-digit number is divisible by seven.
How would you place them?
Extracted from www.divulgamat.net
From left to right: the boy from number 6 making the pine, then the one with the 3 and then the one from 1. The number 931 is formed, which is equal to 7 x 133.