| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
How much is the measured oscillation time different from the predicted time (in seconds and percentages) of the math pendulum?
Answer: −0,005 ?; −0,2 %