Question 23: an archaeologist found some ancient numbers written as follows:

Predict: I predict that I will have to work out what they equal.

Solution:

1 . First figure out what goes into 52.

2. Now you figure out what goes into 40.

3. Now figure out what goes into 13.

4. The answer equals 33.

Summary: The strategies I used was to work out what goes into the number.