Question 1
Editorial self-study SET for 2027; not an official SASMO 2027 examination. Known source years remain in individual attributions. Time: 90 minutes. Platform scoring starts at 0: Q1–15 are worth 2 points each; Q16–25 are worth 4 points each; wrong and blank answers score 0; maximum 70. Official SASMO scoring instead starts at 15, deducts 1 for an incorrect Section A answer and has a maximum of 85. Verified means editorially checked; assumptions, source errors and mathematical uncertainty are disclosed where relevant.
Whenever the hour and minute hands of a clock coincide, the number of germs in a dish increases by 10. Between 7:30 a.m. and 11:30 a.m. on the same day, by how much does the number increase? Use an ordinary clock whose hands move continuously.
The two source keys disagree. Use the stated interval and actual clock-hand meetings; the disagreement is explained after answering.
Whenever the hour and minute hands of a clock coincide, the number of germs in a dish increases by 10. Between 7:30 a.m. and 11:30 a.m. on the same day, by how much does the number increase? Use an ordinary clock whose hands move continuously.
The two source keys disagree. Use the stated interval and actual clock-hand meetings; the disagreement is explained after answering.