THE WELL CONUNDRUM

A snail has fallen down a well. Starting on Monday morning, he tries to clamber out. Every day he cralws up 3 metres, but eveyr night he slips back two metres. The well is 9.7 metres deep. On what day of the week does he escape?

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Monday (Day 8). After 7 days and nights he is 7 metres up the well. On Day 8, Monday, he crawls up another 3 metres and just gets out before nightfall.

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