Does the robot escape?
A robot starts at (0, 0) facing north on an endless grid. F moves it one square forward, L and R turn it 90° left or right on the spot. It repeats the program FFRFFL forever. Does it stay inside some fixed region, or wander off?
This problem is in the rehearsal, with its hints, follow-ups and Mia's marks. Try the free Computer Science problem first.
Oxbridge Interview Rehearsal: two subjects
£249 once. No VAT is charged.
Introductory price £249 until 31 December, then £399.
Rehearse every problem in two subjects you choose, with hints, follow-ups and Mia's marks, for 12 months.
- All 8 problems in each of your two subjects, chosen after you pay
- Hints when you are stuck, then the tutor's follow-up questions
- Mia's marks on up to 60 attempts a day, within a fair-use allowance for each interview season: thinking aloud, using hints, checking, reasoning
- Your next problem picked from your weakest skill
- Your latest 300 attempts saved, with re-attempts side by side
Access for 12 months, until 6 November 2027. Choose your subjects after paying, on a free account. Full refund within 14 days, for any reason.
By paying you agree to our Terms and get access straight away, which ends your 14-day cancellation right. Your full refund within 14 days, for any reason, still applies.Oxbridge Interview Rehearsal: all subjects
£349 once. No VAT is charged.
Introductory price £349 until 31 December, then £499.
Every problem in all seven subjects, for joint courses and for practising beyond your own subject.
- All 56 problems: Maths, Computer Science, Engineering, Physics, Economics, Law and PPE
- Hints when you are stuck, then the tutor's follow-up questions
- Mia's marks on up to 60 attempts a day, within a fair-use allowance for each interview season: thinking aloud, using hints, checking, reasoning
- Your next problem picked from your weakest skill
- Your latest 300 attempts saved, with re-attempts side by side
Access for 12 months, until 6 November 2027. Use it on a free account. Full refund within 14 days, for any reason.
By paying you agree to our Terms and get access straight away, which ends your 14-day cancellation right. Your full refund within 14 days, for any reason, still applies.