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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!
Quiz by Quizmaster
Rate:
Last updated: September 4, 2018
You have not attempted this quiz yet.
First submittedApril 25, 2017
Times taken467,014
Average score60.0%
Rating4.74
1:15
Enter answer here:
0
 / 20 guessed
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Scoring
You scored / = %
This beats or equals % of test takers also scored 100%
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Your fastest time is
Keep scrolling down for answers and more stats ...
Number
Double
469
938
464
928
376
752
298
596
412
824
Number
Double
371
742
965
1930
381
762
530
1060
984
1968
Number
Double
228
456
293
586
123
246
694
1388
159
318
Number
Double
718
1436
416
832
836
1672
105
210
455
910
57 Comments
+24
Level 24
Apr 25, 2017
cool quiz
+5
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!!!!!!! :(
+7
Level 34
Feb 24, 2019
it's out now
+35
Level 34
Feb 24, 2019
it's been out for almost eleven months
+12
Level 39
Dec 22, 2019
lol it only takes like 24 four hours not 11 months
+33
Level 65
Mar 20, 2020
I like this monologue
+3
Level 65
Apr 25, 2017
I like it! A 45 second version would be a real challenge. I can only get in 50 seconds.
+1
Level 58
Mar 20, 2020
Yes! You're right! (:
+1
Level 60
Aug 11, 2023
I feel like this pool is pretty dependent on what you get, though. 350 is much easier than 576.
+1
Level 95
Jun 16, 2017
21'' left
+9
Level 26
Apr 7, 2021
21 inches left?
+1
Level 95
Jun 17, 2017
25'' left
+1
Level 95
Jun 19, 2017
30'' left
+1
Level 95
Jul 13, 2017
32'' left
+1
Level 95
Jul 14, 2017
33'' left
+6
Level 89
Oct 21, 2018
I gonna go the whole yard. 36" left.
+3
Level 25
Nov 17, 2022
Bruh I got a whole mile left; 63360”
+5
Level 77
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!
+2
Level 27
Nov 20, 2021
Same i was on 2 seconds left. Safe to say that gave my heart a run PHEW indeed!!!
+1
Level 95
Sep 19, 2017
36 seconds left
+1
Level 67
Sep 19, 2017
Good work, everyone!

For what it's worth, I had 46 seconds left.

+1
Level 70
Mar 29, 2022
waffler

unless i missed a joke

+2
Level 75
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 36
Sep 19, 2017
Got stuck on 966! damn
+1
Level 60
Aug 11, 2023
966! doesn't even fit in this post. How could they expect you to find double of it?
+1
Level 43
Sep 23, 2017
great quiz! did it in 40 seconds
+1
Level 95
Sep 27, 2017
40'' left
+1
Level 12
Oct 2, 2017
7 seconds left!
+1
Level 48
Mar 2, 2022
snap!
+1
Level 40
Nov 1, 2017
Did it with 30 seconds left
+2
Level 34
Nov 5, 2017
should be rename "quick mafs"
+1
Level 74
Nov 5, 2017
Two plus two is four, minus one that's three, quick mafs.
+1
Level 25
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 34
Apr 2, 2018
i got 16/20 cringe!!!
+1
Level 13
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 20
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 15
Jul 17, 2018
30 seconds left!
+1
Level 26
Jul 18, 2018
im not showing this to my maths teacher haha
+1
Level 21
Oct 1, 2018
35 seconds remaining.
+1
Level 37
Nov 15, 2018
9 seconds left
+1
Level 68
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 56
May 10, 2019
31 seconds remaining
+1
Level 24
Sep 23, 2020
nice quiz!
+2
Level 42
Dec 10, 2020
wonder what the biggest number is that you can double. The biggest I've got was 998
+1
Level 18
Jan 26, 2021
nice quiz!!!
+1
Level 32
Mar 1, 2021
wow, got them all with 1 second left
+1
Level 68
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).

+1
Level 60
Aug 11, 2023
I'm pretty sure that only happens after the quiz. I don't have the same issue while taking the quiz. And your English is fine!
+3
Level 54
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 53
Mar 25, 2022
yay I did it with 35 seconds to spare
+1
Level 53
Mar 25, 2022
beat about 85% of testtakers
+4
Level 69
Feb 5, 2023
If this makes anyone feel better, I have a masters degree in math, I have taught math for 4 years, I can solve partial differential equations and have written countless proofs of theorems in abstract algebra, and my high score on this quiz is only 15/20 lol. Many working mathematicians aren't even that good at simple arithmetic. There are many facets to intelligence, so don't compare yourself to others.