Today Puzzle #636
Puzzle No. 636 鈥� Thursday 19 December
The snow outside Santa's front door is 40cm deep and, as it's getting colder, it's getting 50% deeper every day. How deep will it be in 3 days' time?
Today’s #PuzzleForToday has been set by Hywel Carver, author of Sodding Sums: The 10% of Maths You Actually Need.
Click here for the answer
135cm. 50% deeper today is another 20cm, so 60cm in total tomorrow. 50% deeper than that is another 30cm, so 90cm total in two days. 50% deeper than that is another 45cm, so 135cm in total.
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