I chose a number and divide it by 4. Then I subtracted 18 from the result and got 7. What was the number I chose?	Options:
A) 600
B) 100
C) 800
D) 900
E) none

Rationale: solution : let x be the number i chose , then x / 4 â ˆ ’ 18 = 7 x / 4 = 25 x = 100 answer b
Answer: B