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Sunday, March 25, 2007
"MATH PROBLEM OF THE DAY"
Tom is 10 years older than Carrie. However, 5 years ago Tom was twice as old as Carrie. How old is Carrie? (A) 5 (B) 10 (C) 12 (D) 15 (E) 25
Let C be Carrie’s age. Then Tom’s age is C + 10. Now, 5 years ago, Carrie’s age was C – 5 and Tom’s age was (C + 10) – 5 = C + 5. Since at that time, Tom was twice as old as Carrie, we get 5 + C = 2(C – 5). Solving this equation for C yields C = 15. The answer is (D).
yes the answer is D...Carrie's age is fifteen years...cross check... if Carrie's age is 15 years now, then Tom's age is 25 years..5years ago, Carrie's age is 10 and Tom's age is 20 i.e. twice Carrie's age...
b
ReplyDeletein mathh problem ans is d 15yearsnot b
ReplyDeleteb
ReplyDeleteLet C be Carrie’s age. Then Tom’s age is C + 10. Now, 5 years ago, Carrie’s age was C – 5 and
ReplyDeleteTom’s age was (C + 10) – 5 = C + 5. Since at that time, Tom was twice as old as Carrie, we get
5 + C = 2(C – 5). Solving this equation for C yields C = 15. The answer is (D).
lets the age of tom is X and carrie's is Y
ReplyDeleteX=Y+10........(i)
X-5=2(Y-5)....... (ii)
=>Y +10-5 =2Y-10
=> -Y=- 15
=>y=15
yes the answer is D...Carrie's age is fifteen years...cross check...
ReplyDeleteif Carrie's age is 15 years now, then Tom's age is 25 years..5years ago, Carrie's age is 10 and Tom's age is 20 i.e. twice Carrie's age...
d 15
ReplyDeletelet carrie = x
5+x=2(x-5)
x=15