There are 20 questions in this timed activity?
Answer the questions as correctly as possible by clicking on a boulder.
If the answer is correct the boulder will explode and the answer will be recorded by the counter.
Questions answered incorrectly will reappear until all 20 have been answered correctly.
This resource may best be viewed on your device in 'Full screen' mode by pressing F11.
Click on Start to begin.

Correct answers:

Your time: 00:00:00

The activity record is: 00:03:00

Click start to begin the activity.