- 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.