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!
Quiz by Quizmaster
Rate:
Last updated: September 4, 2018
First submittedApril 25, 2017
Times taken320,445
Average score65.0%
Rating4.72
1:15
Enter answer here:
0
 / 20 guessed
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Keep scrolling down for answers and more stats ...
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Double
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Number
Double
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Number
Double
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Number
Double
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+16
Level 28
Apr 25, 2017
cool quiz
+5
Level 36
Apr 2, 2018
i agree. i made my own quiz today but it is taking forever to get opened to public. sad face!!!!!!! :(
+7
Level 36
Feb 24, 2019
it's out now
+27
Level 36
Feb 24, 2019
it's been out for almost eleven months
+7
Level 33
Dec 22, 2019
lol it only takes like 24 four hours not 11 months
+20
Level 62
Mar 20, 2020
I like this monologue
+3
Level 64
Apr 25, 2017
I like it! A 45 second version would be a real challenge. I can only get in 50 seconds.
+1
Level 54
Mar 20, 2020
Yes! You're right! (:
+1
Level 92
Jun 16, 2017
21'' left
+8
Level 27
Apr 7, 2021
21 inches left?
+1
Level 92
Jun 17, 2017
25'' left
+1
Level 92
Jun 19, 2017
30'' left
+1
Level 92
Jul 13, 2017
32'' left
+1
Level 92
Jul 14, 2017
33'' left
+4
Level 87
Oct 21, 2018
I gonna go the whole yard. 36" left.
+3
Level 75
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 28
Nov 20, 2021
Same i was on 2 seconds left. Safe to say that gave my heart a run PHEW indeed!!!
+1
Level 92
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 58
Mar 29, 2022
waffler

unless i missed a joke

+1
Level 77
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 38
Sep 19, 2017
Got stuck on 966! damn
+1
Level 43
Sep 23, 2017
great quiz! did it in 40 seconds
+1
Level 92
Sep 27, 2017
40'' left
+1
Level 13
Oct 2, 2017
7 seconds left!
+1
Level 46
Mar 2, 2022
snap!
+1
Level 41
Nov 1, 2017
Did it with 30 seconds left
+2
Level 35
Nov 5, 2017
should be rename "quick mafs"
+1
Level 73
Nov 5, 2017
Two plus two is four, minus one that's three, quick mafs.
+1
Level 26
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 71
Dec 9, 2017
Mental Arithmetic...... how good are you? try my Sum the Numbers quiz .........here it is
+1
Level 36
Apr 2, 2018
i got 16/20 cringe!!!
+1
Level 15
Apr 6, 2018
i did it with 29 seconds remaining
+1
Level 47
Apr 18, 2018
Oh, the numbers change every time. Nice.
+1
Level 21
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 26
Jul 18, 2018
im not showing this to my maths teacher haha
+1
Level 25
Oct 1, 2018
35 seconds remaining.
+1
Level 40
Nov 15, 2018
9 seconds left
+1
Level 67
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)

+1
Level 57
May 10, 2019
31 seconds remaining
+1
Level 24
Sep 23, 2020
nice quiz!
+1
Level 38
Dec 10, 2020
wonder what the biggest number is that you can double. The biggest I've got was 998
+1
Level 17
Jan 26, 2021
nice quiz!!!
+1
Level 33
Mar 1, 2021
wow, got them all with 1 second left
+1
Level 66
Mar 1, 2022
Nice quiz, congratulations.

Just found one breach and hopefully my poor English may help me to explain it: if you select the given numbers to double, copy and paste them on a text editor (in my case, on "Notes" of iPhone), you got two columns, the left one with the numbers and right one with the answers.

I know that cheating Jetpunk is cheating yourself, I just wanted to let you know about it. Not sure if it was found already (didn't scroll down all the comment section).

+2
Level 44
Mar 1, 2022
Me: "Wow I got over half! I must be in the top 20 percent or something I'm so good."

This beats 40% of quiztakers.

Oh...

+1
Level 31
Mar 6, 2022
ok
+1
Level 51
Mar 25, 2022
yay I did it with 35 seconds to spare
+1
Level 51
Mar 25, 2022
beat about 85% of testtakers