Question

Alex has a string with nine fixed dices with one number written on each of them. The numbers are in the order 9 8 7 6 5 4 3 2 1. He has another set of dices with plus signs on them and another with minus signs. He has to place the dices with signs in between the ones with numbers so that he gets 100 as the answer. He can't change the order of the numbered dices. What is the least number of dices with signs he needs to get 100?

Answer 1

Answer:

14 okkkkkkkkkkkkkkkkkkkkkkkkl