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Fast Math - Double That Number!
Can you double all these numbers within the time limit? Test your mental math skills!
This quiz changes every time you play!
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Featured Quiz
Last updated: September 4, 2018
More quiz info >>
| First submitted | April 25, 2017 |
| Times taken | 131,997 |
| Rating | 4.65 |
1:15
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Falcons11
+6
level 28
Apr 25, 2017
cool quiz
GeoGenius656
+1
level 34
Apr 2, 2018
i agree. i made my own quiz today but it is taking forever to get opened to public. sad face!!!!!!! :(
GeoGenius656
+1
level 34
Feb 24, 2019
it's out now
GeoGenius656
+7
level 34
Feb 24, 2019
it's been out for almost eleven months
Quizzer6794
+2
level 60
Apr 25, 2017
I like it! A 45 second version would be a real challenge. I can only get in 50 seconds.
sf49ers
+2
level 79
Apr 25, 2017
perhaps there is a way to hide the quiz before you push the start button. One could easily get all the answers prepared before starting and make this exceptionally easy.
DannyWozza
+22
level 86
Apr 26, 2017
People can do that on any quiz - prepare answers before starting it. If people want to cheat that way, leave them to it. It has no bearing on my enjoyment of this site and not sure why you are bothered about how others may or may not do these quizzes. I (and I assume you do given your comment) simply open a quiz and start it straight away without checking the questions as I like to test my knowledge first then gain knowledge when I see the answers I did not know. I wouldn't be surprised if I'd gained more knowledge in my few months on this site than I did from school :)
mahble
+2
level 67
Sep 19, 2017
Ditto. I feel like I know even more now then I did before I created this account :)
Insaniot
+1
level 47
Feb 26, 2018
Yeah. Before I hardly knew any countries, and now I know a large portion of them, and it’s the same with states.
roddyrockstar
+4
level 64
Jul 25, 2017
I like the idea of only having the next question appear after the previous has been answered
catlover2496
+1
level 40
Sep 30, 2017
+1
IneedasHower
+2
level 33
Nov 10, 2017
OK. Maybe this comment has the most replies.
Timbenz
+3
level 28
Apr 2, 2018
No I don’t agree because I like to do the easier ones first not be forced to do them in order.
Sifhraven
+1
level 63
Dec 8, 2018
I agree with timbenz, what if you dont know the say the 2nd answer, but would have know all the other ones. (then it would seem for instance if you only knew 1/100 instead of 99/100
It just wouldnt work imo.
Timbenz
+1
level 28
Apr 2, 2018
You could do that with any quiz. The point of this quiz site is to increase your knowledge, not to ace every quiz with the help of Google.
Sifhraven
+1
level 63
Dec 8, 2018
yea I allways deliberately dont look at the quest. But have wondered many times if others do or dont, very curious to know that. I think it is probably mixed ( leaning more to the "do-look first" side, if the competitive comments is anything to go by...)
Lavoie
+1
level 34
Jun 8, 2017
14/20
Jor85
+1
level 79
Jun 16, 2017
21'' left
Jor85
+1
level 79
Jun 17, 2017
25'' left
Jor85
+1
level 79
Jun 19, 2017
30'' left
Jor85
+1
level 79
Jul 13, 2017
32'' left
Jor85
+1
level 79
Jul 14, 2017
33'' left
someone2018
+1
level 74
Oct 21, 2018
I gonna go the whole yard. 36" left.
mahble
+3
level 67
Jul 25, 2017
1 second left... I almost missed it because I mistyped 882 as 8282, so I was rapidly backspacing with about 2 seconds left and basically jammed the keyboard typing 82 again... PHEW!
Jor85
+1
level 79
Sep 19, 2017
36 seconds left
Pimbard6
+1
level 74
Sep 19, 2017
Good work, everyone!
For what it's worth, I had 46 seconds left.
ander217
+1
level 76
Sep 19, 2017
I'm usually terrible at math but this one was easy for me - 31 sec. left. Thank you, QM, for boosting my math self-esteem today. (Now if only I could find a way to nail those world capitals.)
Mosestomtom
+2
level 39
Sep 19, 2017
Got stuck on 966! damn
Ampo
+1
level 44
Sep 23, 2017
great quiz! did it in 40 seconds
Jor85
+1
level 79
Sep 27, 2017
40'' left
Franpuemont
+1
level 13
Oct 2, 2017
7 seconds left!
JCBCFC
+1
level 43
Nov 1, 2017
Did it with 30 seconds left
Subara
+2
level 36
Nov 5, 2017
should be rename "quick mafs"
Froststar101
+1
level 57
Nov 5, 2017
Two plus two is four, minus one that's three, quick mafs.
Timbenz
+1
level 28
Nov 5, 2017
Did it with 1:15 left!
XD
JlDaBeast123
+1
level 2
Dec 7, 2017
I got them all with 49 seconds left
Malbaby
+1
level 67
Dec 9, 2017
Mental Arithmetic...... how good are you? try my Sum the Numbers quiz .........here it is
GeoGenius656
+1
level 34
Apr 2, 2018
i got 16/20 cringe!!!
crazynbafan8
+1
level 15
Apr 6, 2018
i did it with 29 seconds remaining
Papaya
+1
level 44
Apr 18, 2018
Oh, the numbers change every time. Nice.
x277
+1
level 21
May 1, 2018
great quiz. I got the last number with :01 to spare. Very good for mental Math.
ImAJetPunk
+1
level 18
May 18, 2018
I got all of them and i'm eleven, I cheated though and did it untimed!
vinchenzo
+1
level 17
Jul 17, 2018
30 seconds left!
JoshB04
+1
level 22
Jul 18, 2018
im not showing this to my maths teacher haha
delpieric
+1
level 25
Oct 1, 2018
35 seconds remaining.
Anshul
+1
level 40
Nov 15, 2018
9 seconds left
Sifhraven
+1
level 63
Dec 8, 2018
Nice one! was better than I though, only missed two.
Felt more intuitive than actually doing the math after a while, but each time my answer was right, didnt have any mistakes, which surprised me actually.
Because I typed it before I was even sure it was right (inner debate, nooo dont type it yet, we arent so yet -alter ego- no just dive right in, it ll be fine)
Raz07
+1
level 43
May 10, 2019
31 seconds remaining
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