The number of lilies in a pond double every day. So, on the first day of the month there is one lily. On the second day, two lilies. Then the next day four lilies, then eight, sixteen, thirty two, etc. If the pond is full on the 30th day of the month, what day is it half full?
2006-10-21 15:59:12 · 20 answers · asked by Mr T 4 in Entertainment & Music ➔ Jokes & Riddles
The 29th
2006-10-21 16:00:13 · answer #1 · answered by Benanen 3 · 0⤊ 0⤋
30th day pond is full there are 2^29 or 536870912 lilies
Half of that is 2^28 or 263435456 which is the 29th
2006-10-21 23:04:41 · answer #2 · answered by Anonymous · 0⤊ 1⤋
29
2006-10-21 23:14:53 · answer #3 · answered by hoodoowoman 4 · 0⤊ 0⤋
on the 29th because if it doubles everyday, the double of half of 30 (15) = 30
2006-10-21 23:04:49 · answer #4 · answered by um yea hi 4 · 0⤊ 0⤋
im pretty sure it is the 29th day, because it doubles into the whole pond the next day.
2006-10-22 00:13:00 · answer #5 · answered by iball6 2 · 0⤊ 0⤋
On the 29th day.
2006-10-21 23:01:42 · answer #6 · answered by Yoro 3 · 0⤊ 0⤋
the 29th
2006-10-21 23:00:55 · answer #7 · answered by J.D. 1 · 0⤊ 0⤋
29th
2006-10-21 23:01:12 · answer #8 · answered by a 2 · 0⤊ 0⤋
29th day
2006-10-21 23:04:03 · answer #9 · answered by chewy1111111 2 · 0⤊ 0⤋
the 29, someone actually put 15. lol.
2006-10-22 00:54:14 · answer #10 · answered by thatdude 2 · 0⤊ 0⤋