Riddle #371

Share This Riddle

FacebookTwitterGoogle+PinterestReddit

25.8k views
44 ratings
1 saves

Question: You have found a mutant algae that doubles in size every hour. It takes 18 hours for one algae plant to take up half of a certain lake.

How long would it take for two of these plants to take up half of the same lake?

Answer: 17 hours. At 17 hours the one plant will take up 1/4 of the lake (1/2 of 1/2). At 17 hours the two plants would be double the size of the one plant and double 1/4 is one half.

Riddle Discussion

Similar Riddles

Sequence (medium)

28 views
1 ratings
0 saves

By CTech

Question: What is the next sequence of numbers and why? 1 11 21 1211 111221 312211

Answer: 13112221 Read off the digits of the previous member and count the number of digits in groups of the same digit. There is one # 3, one # 1, two #2s, and two #1, thus, 13112221.

Share this:FacebookTwitterGoogle+

4.8M views
6369 ratings
34 saves

Question: What tastes better than it smells?

Answer: A tongue.

Share this:FacebookTwitterGoogle+

2.6M views
3820 ratings
34 saves

Question: What loses its head in the morning and gets it back at night?

Answer: A pillow.

Share this:FacebookTwitterGoogle+

5M views
6501 ratings
59 saves

Question: What two things can you never eat for breakfast?

Answer: Lunch and dinner!

Share this:FacebookTwitterGoogle+

3.8M views
4935 ratings
24 saves

Question: What asks but never answers?

Answer: An owl!

Share this:FacebookTwitterGoogle+

© 2013-2014 Good Riddles Now. All rights reserved.

FacebookTwitterGoogle+RSS Feed