I am standing behind five pupils who are signalling a five-digit number to someone on the opposite side of the playground. From where I am standing the number looks like 23456. What number is actually being signalled?
I am standing behind five pupils who are signalling a five-digit number to someone on the opposite side of the playground. From where I am standing the number looks like 23456. What number is actually being signalled?
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.