Question 15
Jack makes a domino snake of eight tiles. Touching ends have the same number of dots, from 0 to 6. Originally the snake had 50 dots, but some are missing. Can you find the total number of dots in the places of the question marks?
Editorial clarification: the printed choices are pairs, although the original wording says “total.” For this scored version, choose the unordered pair of numbers at the two question marks. Their sum and the possible orders are explained in the solution.
Editorial clarification: the printed choices are pairs, although the original wording says “total.” For this scored version, choose the unordered pair of numbers at the two question marks. Their sum and the possible orders are explained in the solution.