1

7

A rectangle built from 9 squares

1

31

A rectangle built from 9 squares

43

34A rectangle or square built from 11 squares.

7

4

682

3

A rectangle or square built from 22 squares.

14

35 33

9

A rectangle or square built from 24 squares.

37

35

29

19

A square built of the fewest different squares.

14

7

6

9

15

24

14

7

5

9

15

24

I made a mistake posting this puzzle the first time. I wrongly put a 5 in this square!

See that the two squares with an X will always have the same

size!

x

x

Thanks to Kaela Worrell’s daughter for finding this! I only half apologize for my

mistakes. Finding impossible problems and proving that

they are impossible is a very rich activity! In my own

classes I purposely do it, but this, alas was an unintentional

mistake. Ouch ;-)