#### You may also like ### Bat Wings

Two students collected some data on the wingspan of bats, but each lost a measurement. Can you find the missing information? ### Kate's Date

When Kate ate a giant date, the average weight of the dates decreased. What was the weight of the date that Kate ate? ### Balancing the Books

How many visitors does a tourist attraction need next week in order to break even?

##### Age 11 to 14Challenge Level

Can you find sets of positive integers that satisfy the following?

1. Three numbers with mean $3$ and mode $2$

2. Three numbers with mean $7$ and mode $10$

3. Three numbers with mean $8$, median $10$ and range $8$

4. Four numbers with mean $7.5$, mode $6$ and median $7$

5. Four numbers with mean $6$, median $6.5$ and range $11$

6. Five numbers with mean $4$, mode $3$ and range $9$

7. Five numbers with mean $4$, mode $2$ and range $6$ (two possible solutions)

8. Five numbers with mean $7$, mode $7$ and range $10$ (three possible solutions)

Extension

Can you find a set of four numbers with mean $4$, mode $1$, median $2$ and range $10$?

How about a set of five numbers?
Or six numbers?
Or...
Or 100 numbers?

If you enjoyed this problem, you may also be interested in M, M and M.

With thanks to Don Steward, whose ideas formed the basis of this problem.