10 tricky math riddles: can you crack them all?

Simple math riddles and equations can become a good way to spend quality time and train your brain. Let's get better at solving math puzzles together!

Click on the riddle to see the right answer.

How many of these did you get right?

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What are your thoughts on this subject?
Number 7 could also equal 40: do the addition then add the results of the previous equation. 8+11 = 19, then add 21 (answer from previous equation) = 40
Apr 13, 2019 1:18PM
Paul Fletcher
#2 answer can also be 63 7,15,31,63. 7x2+1=15 15x2+1=31 31x2+1=63
Apr 12, 2019 6:24PM
Bill Cain
Question 5 doesn't ask a question, question 7 doesn't have enough information to get to your solution, since I could also add on from the previous equation to get my answer of 40. Question 9 doesn't say you only use the symbols once, to 2+5=3+4.
Jun 18, 2019 5:08PM
#5 is not a question!! #9 also 2+5=3+4 .. it doesn't say you have to use each symbol only once!!
Jun 24, 2019 5:27PM
Steve Hicks
Too many errors in these questions and answers to be legit
Sep 25, 2020 1:57AM
Agnes Bridget Estrella
There is more than 1 way to answer #7
Jul 28, 2020 9:12PM
Dan Engele
Bill Cain, the information is there. You need to figure out in between what 4+7, 5+8, 6+9, 7+10 are equal to.
Jun 26, 2020 5:32PM
Michael Doherty
James Williams, the order has no bearing on the answer. It will always be zero.
Jan 8, 2020 5:59PM
Veronics Moss
Interesting but not a lover of maths.
Jan 6, 2020 4:22PM
Ian Swindale
Being totally thick and useless at maths I didn't get any and to be honest I didn't even understand some of them or the answers given. Bottom of the class!!
Sep 30, 2019 5:09PM
Don Racette
Jul 5, 2019 11:14PM
James Williams
#10 depends on in which order you multiply them., If you start with 1 and go in ascending order it =0 if you start with 0 and go in descending order it = 40,320
Jun 17, 2019 5:11PM
Eric Rae
1+2+3 is the same as 1x2x3 Steven Black,
May 23, 2019 5:19PM
Warren Price
The answer to 7 is 19. The second and third answers are just wrong.
May 20, 2019 11:13AM
Fred Zeb Fudpucker
Could not see the questions.
May 19, 2019 6:16PM
Steven Black
Richard Jamieson, you are absolutely right! Several statements are completely wrong!
May 12, 2019 5:01PM
Steven Black
#1 is completely wrong! 1+1=2, 1x1=1... 2+2=4, 2x2=4... 3+3=6, 3x3=9
May 12, 2019 5:00PM

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