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13 Apr 2021, 05:45
Kudos
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
72% (01:37) correct
28%
(02:10)
wrong
based on 58
sessions
History
Date
Time
Result
Not Attempted Yet
A seller mistakenly reversed the digits of a customer’s correct amount of change and returned an incorrect amount of change. If he received 63 cents more than he should have, which of the following could be the correct amount of change he should have got, in cents?
(A) 25
(B) 38
(C) 73
(D) 89
(E) 92
(A) 25
(B) 38
(C) 73
(D) 89
(E) 92
Thelegend2631
Posts: 371
13 Apr 2021, 05:53
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Assume the correct change be 10X + Y
For example 45 can be written as 40+5 ( 10*4 + 5 )
Now he has reversed the change, which means
He got 10Y + X
He recieved 63 cents extra
10Y+ X - ( 10X + Y ) = 9Y - 9X
9 (Y-X) = 63
Y-X = 7
7 is the difference in digits ,
only E fits with a difference of 7 amongst its digits
Answer E 92
Posted from my mobile device
For example 45 can be written as 40+5 ( 10*4 + 5 )
Now he has reversed the change, which means
He got 10Y + X
He recieved 63 cents extra
10Y+ X - ( 10X + Y ) = 9Y - 9X
9 (Y-X) = 63
Y-X = 7
7 is the difference in digits ,
only E fits with a difference of 7 amongst its digits
Answer E 92
Posted from my mobile device
13 Apr 2021, 08:35
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Bunuel
"A seller mistakenly reversed the digits of a customer’s correct amount of change and returned an incorrect amount of change. If the customer received 63 cents more than he should have, which of the following could be the correct amount of change he should have got, in cents? , in cents?"
There are a couple of ways to solve this question.
First way, let the amount that the customer gave be 10x+y
So, reversing the digits = 63 + 10x + y
10y + x = 63 + 10x + y
9y-9x = 63
y-x = 7 (Option E) As the difference between the digits is 7
Second way to solve this question:
Use the options.
Reverse the options and add 63 to it to find if it matches the number.
29 + 63 = 92 (Option E)
