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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!
Last updated: September 04, 2018
Rate:
1:15
Enter answer here:
0
 / 20 guessed
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+3
level 28
Apr 25, 2017
cool quiz
+1
level 21
Apr 2, 2018
i agree. i made my own quiz today but it is taking forever to get opened to public. sad face!!!!!!! :(
+1
level 57
Apr 25, 2017
I like it! A 45 second version would be a real challenge. I can only get in 50 seconds.
+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.
+15
level 82
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 :)
+2
level 60
Sep 19, 2017
Ditto. I feel like I know even more now then I did before I created this account :)
+1
level 44
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.
+2
level 62
Jul 25, 2017
I like the idea of only having the next question appear after the previous has been answered
+1
level 39
Sep 30, 2017
+1
+1
level 33
Nov 10, 2017
OK. Maybe this comment has the most replies.
+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.
+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.
+1
level 34
Jun 8, 2017
14/20
+1
level 74
Jun 16, 2017
21'' left
+1
level 74
Jun 17, 2017
25'' left
+1
level 74
Jun 19, 2017
30'' left
+1
level 74
Jul 13, 2017
32'' left
+1
level 74
Jul 14, 2017
33'' left
+3
level 60
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!
+1
level 33
Aug 12, 2017
Noo! I was 2 seconds left, my last question being 665 *2... 1 3, 1 second... 3 time's up!
+1
level 44
Aug 25, 2017
33 seconds left!
+1
level 74
Sep 19, 2017
36 seconds left
+1
level 74
Sep 19, 2017
Good work, everyone! For what it's worth, I had 46 seconds left.
+1
level 74
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.)
+2
level 39
Sep 19, 2017
Got stuck on 966! damn
+1
level 44
Sep 23, 2017
great quiz! did it in 40 seconds
+1
level 74
Sep 27, 2017
40'' left
+1
level 13
Oct 2, 2017
7 seconds left!
+1
level 43
Nov 1, 2017
Did it with 30 seconds left
+2
level 36
Nov 5, 2017
should be rename "quick mafs"
+1
level 57
Nov 5, 2017
Two plus two is four, minus one that's three, quick mafs.
+1
level 28
Nov 5, 2017
Did it with 1:15 left! XD
+1
level 2
Dec 7, 2017
I got them all with 49 seconds left
+1
level 66
Dec 9, 2017
Mental Arithmetic...... how good are you? try my Sum the Numbers quiz .........here it is
+1
level 21
Apr 2, 2018
i got 16/20 cringe!!!
+1
level 15
Apr 6, 2018
i did it with 29 seconds remaining
+1
level 37
Apr 18, 2018
Oh, the numbers change every time. Nice.
+1
level 22
May 1, 2018
great quiz. I got the last number with :01 to spare. Very good for mental Math.
+1
level 18
May 18, 2018
I got all of them and i'm eleven, I cheated though and did it untimed!
+1
level 17
Jul 17, 2018
30 seconds left!
+1
level 14
Jul 18, 2018
im not showing this to my maths teacher haha
+1
level 25
Oct 1, 2018
35 seconds remaining.
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