Multiple choice general knowledge

A lake contains lilly flowers which doubles in its number each day (eg: 1st- oneflower, 2nd- 2 flowers, 3- 4 flowers....) If it takes 15 days to fill half of the lake, how many days to will it take to fill full the lake full of flowers?

  1. 30

  2. 20

  3. 15

  4. 16
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is a classic exponential growth puzzle. If the flowers double each day and the lake is half full on day 15, then on day 16 it will be completely full (half × 2 = full). The key insight is recognizing that doubling one day before completion results in exactly half the capacity.

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