don steward
mathematics teaching 10 ~ 16

Thursday, 21 April 2011

multiple puzzles

M(15) means the number must be a multiple of 15 i.e. 15 or 30 or 45 or 60 or 75 or 90
find four digits (all differenet) to go in each of the boxes to make 2-digit multiples of the required number when you read across and down:

No comments: