The Yamazing and Yeggastradinary ZLog of my Self Indulgence!
Friday, February 29, 2008
Advantage of Abstraction
A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost? A. $1.10 B. $0.10 C. $0.05 D. $1.00 E. $0.15
Whaddya think? If you said (B) please think again.
4 comments:
Cute linguistic puzzle:
first : bat + ball = 1.1
second : bat = ball + 1
Then we have
bat + ball = 1.1
bat -ball - 1
-------------
Subtracting first from second we get
2*ball = 0.1
so ball is 0.05 and hence (C)
Arrrrrrgh I dont get it!!!!!
x plus y is 1.10
and x-y is 1
so cancel out y
2x = 2.10
x = 1.05
so y = 1.10-1.05
= .05
(Thank you sis)
Thats yanother way but regardless, the "Aha!" moment is what counts here
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