First you want to right down 1 2 3 4 5. Then you will tell them you will find there number. while pointing at every number over and over again you will look at them and see when they flinch or make any movement. The number that they flinched on will probibly be there number or the number before that number. If you stop on the wrong number make it like you ment to do that. Then you will know which number is theres so go over every number that not correct until you have there number last.