The question :
Can you make 100 by interspersing any number of pluses and minuses within the string of digits 9 8 7 6 5 4 3 2 1 ?
You can’t change the order of the digits ! So what’s the least number of pluses and minuses needed to make 100 ? 9 8 7 6 5 4 3 2 1
100 ?