Describe how to use rods and the linear model to show that 2 is a factor of 10. Make a rod of length 10. Get rods of length 2. Describe how to use tiles and the rectangular model to show that 24 is a multiple of 8. This can be done with exactly 3 full rows of 8, and that uses exactly all 24 tiles in a rectangle.
T See below, with explanations.
We know this because 5040 is an even number. You check the last two digits. The test is to look at the last three digits. 040 is divisible by 8 so 5040 is, too. You add up all the digits, and if they sum to a multiple of 9, then the original number is divisible by 9.