Type this formula into cell A1 in a spreadsheet: = RANDBETWEEN(0,500).

This will generate a random integer (whole number) between 0 and 500. Copy the formula down to cell A20 to generate 20 random numbers in the first column of the spreadsheet, for example as shown here.

a. Use divisibility tests to find out which of your random numbers are divisible by either 2, 3 or 6. 

b. Which of your random numbers are divisible by either 5,10 or 100? 

c. Which of your random numbers are divisible by 9? 

d. Is it true that any number which is divisible by 9 is also divisible by 3? 

Explain your answer. 

e. Is it true that any number which is divisible by 3 is also divisible by 9? Explain your answer.  

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