Brain Teasers
Tricky Math
Solve the following problem:
0+0-0+1-1+2-2+3-3+4-4+5-5+6-6+7-7+8-8+9-9+10-10+11-11+12-12+13-13+14-14+15-15+16-16+17-17+18-18+19-19+20-20+21+22-22+23-23+24-24+25-25+26-26+27-27+28-28+29-29+30-30+31-31+32-32+33-33+34-34+35-35+36-36+37-37+38-38+39-39+40-40+41-41+42-42+43-43+44-44+45-45+46-46+47-47+48-48+49-49+50-50=??
0+0-0+1-1+2-2+3-3+4-4+5-5+6-6+7-7+8-8+9-9+10-10+11-11+12-12+13-13+14-14+15-15+16-16+17-17+18-18+19-19+20-20+21+22-22+23-23+24-24+25-25+26-26+27-27+28-28+29-29+30-30+31-31+32-32+33-33+34-34+35-35+36-36+37-37+38-38+39-39+40-40+41-41+42-42+43-43+44-44+45-45+46-46+47-47+48-48+49-49+50-50=??
Hint
Is there a pattern through the whole problem?Answer
21If you read carefully you would notice it was 0+0-0+1-1+...+20-20+21+22-22+...+50-50=??
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Comments
I don't get it...O_o
Very tricky. lol
Tricky! i didnt take the time to read through it but it was still really good!
I just figured it was 0 but that was dumb of me i should have read it.
Ok what ever i dont get it i dont get alot of teasers
Didn't like this one,
i liked this one coz i actually got it
sooo cute!
Sorry, still didn't get it, even on my second try. I get zero!
is this trick or MATH? O.o
i thought it was 0 too cuz i didnt read all the way thru it. it IS trick because you dont really have to solve anything you have to just read it carefully
oooooooooooooooh, u have to read it through, oh well lazy me. I thought it was zero.
that was kind of mean...
i thought tht wuz dumb
nice
Why say there is a pattern through the whole thing? Doesn't the pattern stop at 21, then continue again at 22? Bad hint.
I tried to correct the hint but I failed.
I GOT IT!! YESS. SWEET! ya it was pretty good! keep'em comin'!
k?
k?
i thought it was 0 because that was under trick not math that retarded dork put it under math next time
I ACTUALLY DID THE MATH AND GOT 21.. IT WAS A GREAT TIME KILLER THOUGH
i did not get it. i got zero instead of 21 cause 50-5 is 0 not 21 duh!
tried a second time and still didnt get it.
I just stared at it for 15 minsand got it!!
I didn't like this teaser at all. I thought it was zero because I read the first part of the equation and saw it was basically + something and then - it. So I just browsed through the whole equation quickly (I can't be bothered going through the whole thing) and I thought the pattern was consistent the whole way, then I checked the hint and it confirmed it, so I thought the answer was zero. Very bad and misleading hint. Oh well better luck next time.
yeah. the hint was misleading, but you know that it was a good question. and for people who dont get it, it is plus a number, then minus it. except 21. for that it is just +21, with no -21. there yah go. good trick, but work on the hints.
i dont get it???!!!!!!!!
WHY??????????
WHY??????????
Thanks...at last a teaser with some depth
Very clever, testing our patience! A good teaser!
all right, smarty pants, that was tricky.
I thought it was zero too. Just goes to show during tests read your questions carefully!
dumbest dumb in dumb town TWO thumbs a mile down
I got it wrong. I just assumed that each number had a match. Got me on that one!
That was more a lame trick than a trick teaser.
It's like the triangle problem with "A bird in the the hand" written inside... and the writer thinking it was clever.
It's like the triangle problem with "A bird in the the hand" written inside... and the writer thinking it was clever.
extremely long but stretches the page
You have to look for the trick. Don't you? A very tricky and manipulative teaser. I commend you. Keep up the eye-twirling, thought-provoking work. I enjoy it!
very good. I knew that there was going to be something like that in there. it would have been more confusing if you mixed up all the positions of the numbers
i thought you really tricked me
Shouldn't that be in math?
i saw the minus sign before i read the answer. i was wondering what kind of trick you had for your teaser....
TRICKY!
good teaser!
good teaser!
not the best, but still very good... it was tricky (but i got it, i have to read small print a work...) but it didn't reallt require any thought, either you noticed or not...
I thought I had it but..........................................
tricky grammar you had
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