A problem which crops up quite often in puzzles is that of inserting mathematical signs wherever one cares to between the digits 1,2,3,4,5,6,7,8, and 9 to make the resulting expression equal in value to 100. The digits must remain in the same sequence. One of the numerous solutions to this problem is:
1+2+3+4+5+6+7+(8x9)=100
The problem becomes slightly more difficult if only plus and minus signs are allowed. A typical solution to the problem now is this:
12+3-4+5+67+8+9=100
In this solution, six plus and minus signs were used.
Can you find a solution to this plus-and-minus-only problem using as few signs as possible?
Arif Nawaz
Living here far away I am yours…Living there far away you are mine…Love is not made of bodies only…Deep in our hearts is where we are one…!