Crazy sums!
Level
pending
I can correct the following sum by adding m line/s which can be done in n way/s. If m is as small as possible, then m+n=?
21 - 220 = 2-1
Note: A valid equality must be formed. No cancellations of numbers allowed too.
The answer is 5.
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1 solution
m=3 and n=2.
Method 1: Add a line to the minus sign on the left hand side of the equation so that I will get 21+220 which is 241. Now add 2 lines to the minus sign on the right-hand side of the equation to turn it into a 4.
Method 2:Add 3 lines to under 220 to get 1 1 2 2 0 . Hence m+n = 3 + 2 = 5 .