How many numbers between 100 and 200 would be divisible by both 9 and 6?

Question

1 2 3 4 5 6 7 8 9 = 100
Challenge:
Place + and - math symbols between the numbers above to make the equation true.
Use + and - a total of three times.
Do not rearrange the numbers.

Answer 1

LCM of 9 & 6 = 18
Multiples of 18 >100 & < 200
18 × 6 = 108
18 × 7 = 126
18 × 8 = 144
18 × 9 = 162
18 × 10 = 180
18 × 11 = 198
ie., 6 numbers.