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Fast Math - Subtraction Quiz

Try to beat the clock by answering these randomly-generated subtraction problems in your head.
This quiz changes every time you play!
Quiz by Photop
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Last updated: April 12, 2023
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First submittedSeptember 15, 2017
Times taken38,227
Average score95.0%
Rating4.52
2:00
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0
 / 20 guessed
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Keep scrolling down for answers and more stats ...
Problem
Answer
45 - 40
5
50 - 37
13
90 - 68
22
54 - 23
31
95 - 88
7
34 - 23
11
45 - 44
1
Problem
Answer
53 - 36
17
47 - 27
20
73 - 49
24
64 - 30
34
55 - 4
51
35 - 30
5
6 - 5
1
Problem
Answer
95 - 22
73
52 - 34
18
78 - 43
35
97 - 18
79
40 - 38
2
61 - 18
43
27 Comments
+9
Level ∞
Apr 12, 2023
Sorry for the few dozen people who took this quiz right after it was featured and had problems. Unfortunately, I've had to reset the stats for technical reasons. It should all work correctly now.
+2
Level 74
Apr 12, 2023
Thanks for fixing it!
+1
Level 43
May 26, 2023
You should shorten it by a minute or two, anybody can do this.
+1
Level 59
Apr 12, 2023
Thank you for fixing it!
+1
Level 43
May 26, 2023
shorten the time by a minute or two.
+47
Level 77
Apr 12, 2023
that's a lot of time for a "fast" math quiz
+4
Level 77
Apr 12, 2023
Agreed. I took my time, and it still only took 43 seconds.
+2
Level 77
Apr 12, 2023
Agreed. I took my time, mistyped a few times, messed up a couple of times and still only took 48 seconds. Way too much time.
+1
Level 60
Apr 12, 2023
Agreed. I took my time, and yet I still only used 48 seconds.
+1
Level 60
May 12, 2023
Exact same time here!
+9
Level 84
Apr 12, 2023
I'd say 1 minute too long.
+4
Level 90
Apr 12, 2023
Agree, I had over a minute left and I wasn't going too hard.
+1
Level 60
May 12, 2023
I'd say 2 minutes too long.
+4
Level 59
Apr 12, 2023
Due to the resets it's the 3rd time I'm taking this..
+1
Level 82
Apr 12, 2023
good easy quiz
+9
Level 84
Apr 12, 2023
5 points for everybody!

Addition by subtraction.

+2
Level 95
Apr 13, 2023
I made it using only 50 seconds, and I think I was pretty slow today.
+6
Level 23
Apr 25, 2023
I think you should lower the time a bit
+1
Level 69
May 11, 2023
Agreed.
+1
Level 55
May 11, 2023
definitely too much time... brain not work properly but only use minute
+1
Level 43
May 26, 2023
honestly how are yall on that high of a level or am I just not nerdy enough?
+1
Level 78
May 13, 2023
Finished in 32 secs!
+1
Level 37
Dec 3, 2023
Must try to beat you bro
+1
Level 37
Dec 3, 2023
I assume that's impossible for me.
+2
Level 70
May 14, 2023
I agree that there is too much time, with the title being "Fast math". Will a change of the time also trigger a reset of the quiz???
+2
Level 24
Oct 27, 2023
This quiz was delectable! Utter brilliance by the creator. My gratitude
+1
Level 55
Oct 27, 2023
i think you should jump super high off a building respectfully bc ur so smart