This must be done in your head only, very tricky.?
493444
this really only works when its done verbally...when people are looking at the numbers, its much easier to realize that the answer is 4100 instead of 5000, pretty neat one isnt it
122847
with a crowbar and sledge hammer. Otherwise, practice!
876924
Blue, I thought you said this was a tricky one!
1067011
it's possible but it's extremely hard. No pun intended.
226023
Step by step . You or she are not the first who do it in the world . Just take it easy .
1183405
Actually, make that a "Tricky Dick"... <grin>
282796
for brains only?!?!\nA five year old could do this; but seriously, I learned this in grade school...4th maybe 5th grade...\nYou don't have to be a "brain" to do these problems.
807448
that might be a bit difficult.....
836509
Sorry, but there is no legitimate or safe way to do it
318270
This is not the best way for sure...
1038604
in a proper way using your brain
163340
its easy...much easy more than u can just think,\ntry it..
242373
The best was to do that is with a calculator.  It'll take forever to do it by hand.
746727
Find someone else to think about.\n\nSeriously it's the only way.
352341
Have someone help you. This is more fun anyway then going and doing it yourself
582369
its only hard if you make it hard\n\nbe prepared to be very good in math and physics..
865959
There's an EASY way??