I came across the following question on an IQ test, the answer to which I was left guessing on, after several minutes trying to solve it (non-mathematically):
Water is dripping into an empty glass. Each minute, the number of drops doubles. The glass is full in one hour. How many minutes does it take to fill the glass up to half?
a. 30 minutes
b. 40 minutes
c. 59 minutes
d. 1 minute
e. 23 minutes
2007-07-26 12:27:53 · 13 answers · asked by BeautifulGirl 2 in Science & Mathematics ➔ Mathematics
HOW EASY IS DAT!!!!!!!!!!!!!!!!!!!!!
i got a riddle for ya, beautiful girl!
My plant doubles in height everyday. If it grows to be 20 inches in 10 days, how long before its 40 inches????
and by the way wat did u get on ur IQ? Shudnt think it was a high 1!!! coz like it or not, thats an easy question!
2007-07-26 12:34:55 · answer #1 · answered by Khan Sahab!!!! 1 · 0⤊ 0⤋
Several wrong answers here.
The correct answer is (c) 59 minutes. Imagine 1, 2, 4, 8, 16 etc - in each iteration, the number of drops doubles. So always the last iteration accounts for half the total.
.
2007-07-26 12:38:43 · answer #2 · answered by tsr21 6 · 0⤊ 0⤋
Hi. Answer 1 is correct, but actually the glass may reach the halfway point after the first drop of the last minute depending on whether or not the number of drops needed to fill the glass is even or odd.
2007-07-26 12:33:40 · answer #3 · answered by Cirric 7 · 0⤊ 0⤋
59 minutes, you can see number drops as certain amount of water. Amount of waters pouring into the glass doubles every minute. if the glass is not over flowing then it has to be 59 minute and then just enough water to fill it up in one minute.
2007-07-26 14:43:16 · answer #4 · answered by jay 1 · 0⤊ 0⤋
If the number of drops doubles each minute, then the condition of the glass at 1hr - 1 minute would have to be half-full.
2007-07-26 12:37:09 · answer #5 · answered by Helmut 7 · 0⤊ 0⤋
59 minutes. In that last minute the number of drops doubles: there's your other half.
2007-07-26 12:34:16 · answer #6 · answered by Grampedo 7 · 0⤊ 0⤋
59 minutes is the correct answer. since it doubles every minute, then 1 minute before it is full, it was half full. therefore, it was half full in 59 minutes. sounds alot like an SAT question.
2007-07-26 12:57:22 · answer #7 · answered by nach17mets 2 · 0⤊ 0⤋
If it is full after 60 minutes, it was half full one minute earlier (59 minutes).
2007-07-26 12:36:57 · answer #8 · answered by Anonymous · 0⤊ 0⤋
The posters answering c are the suitable option. i'm in simple terms responding to remark approximately how unrealistic this question is. The form of drops interior the final minute is two^fifty 9 situations the form of drops interior the 1st minute. there isn't any longer adequate water interior the sea to fill this glass. :)
2016-11-10 08:49:05 · answer #9 · answered by Anonymous · 0⤊ 0⤋
59 minutes..Because it doubles each minute.. so 1 minutes before it fills up it is "HALFWAY" filled.. then it doubles so its full
2007-07-26 12:29:52 · answer #10 · answered by Jeƒƒ Lebowski 6 · 3⤊ 0⤋