Write your names, school and candidate number in the spaces provided at the top of the page.
You have 30 minutes for this paper which is worth 20 marks.
Answer all the questions, attempting them in order and writing your
answers clearly. If you find that you cannot answer a question straight away leave it blank and return to it later if you have time. Do not leave blank answer spaces, make
the best attempt at an answer that you can.
If you need to change an answer cross it out neatly and write the new answer alongside the box.
20. Ten cards numbered from 1 to 10 are put in order in a pile, with 1 on
the top. I move one card from the top and place it at the bottom,
and then throw the new top card away. Then I put the new top card
to the bottom, and this time a second top card to the bottom,
before throwing away the next one. Now I put the new top card to
the bottom, the next top card to the bottom, and now a third top card
to the bottom, before throwing the next one away. Finally, I put the
top card to the bottom, the next top card to the bottom, the next top
card to the bottom, a fourth top card to the bottom, and throw
away the next card. What number is on the card now at the
top of the pile?