Multiple choice general knowledge math & puzzles

A snail creeps 6 ft up a wall during the daytime. After all the labor it does throughout the day, it stops to rest a while... but falls asleep!! The next morning it wakes up and discovers that it has slipped down 2 ft while sleeping. If this happens every day, how many days will the snail take to reach the top of a wall 74 ft in height?

  1. 18

  2. 16

  3. 19

  4. 15
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The snail gains 4 ft net each day (6 up, 2 down). On the last day, it will reach the top during its 6 ft climb and not slip back. 74 - 6 = 68 ft. It takes 68/4 = 17 days to reach 68 ft. On the 18th day, it climbs 6 ft to reach 74 ft.

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