18 inches.
This is true because 40% of 60 is 24. 75% of 24 is 18. :))
5 - 2 times 38 is -71.
Have a nice day
So it is distance from zero so 6+15=21
1 2 3 4 5 6 7 8 9 10 (11) 12 13 14 15 16 17 18 19 20 21
eliminate one from each side till you find the middle