You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[EX Q]: Question: When the no.7y86038 is exactly divisible by 11, then the smallest whole no.in place of y?

 Option A: 3

 Option B: 4

 Option C: 6

 Option D: 7

 Option E: 9
[EX A]: Option A

[EX Q]: Question: A shirt goes on sale for 80% of its original price. One week later, the sale price is marked down 20%. The final price is what percent of the original price?

 Option A: 72%

 Option B: 70%

 Option C: 52%

 Option D: 64%

 Option E: 28%
[EX A]: Option D

[EX Q]: Question: 40 is subtracted from 60% of a number, the result is 50. Find the number?

 Option A: 150

 Option B: 887

 Option C: 769

 Option D: 266

 Option E: 291
[EX A]:
Option A