Alex age after 13years will be 10 times his age 10years back. What is the present age of Alex?
Options:
A) 15	B) 13	C) 20	D) 21	E) 26

Rationale: let alex ' s present age be x alex ' s age after 17 years = x + 17 alex ' s age 10 years back = x - 10 x + 17 = 10 ( x - 10 ) x = 13 rajeev ' s present age = 13 years answer is b
Answer: B