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27 Feb 2024, 02:30
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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:
5%
(low)
Question Stats:
95% (01:23) correct
5%
(01:42)
wrong
based on 92
sessions
History
Date
Time
Result
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The sum of a two digit number and the number obtained by reversing the order of its digits is 121. If the two digits differ by 3, find the 2 digits of the number?
A. 8,5
B. 6,9
C. 6,3
D. 7,3
E. 7,4
A. 8,5
B. 6,9
C. 6,3
D. 7,3
E. 7,4
jack5397
Joined: 13 Sep 2020
Last visit: 15 May 2025
Posts: 139
Given Kudos: 278
Location: India
Concentration: General Management, Strategy
Schools: ISB '27 IIMA '26 INSEAD '26
GMAT Focus 1: 575 Q79 V79 DI77 
GMAT Focus 2: 575 Q80 V81 DI75
GMAT Focus 3: 635 Q82 V83 DI79 
GMAT 1: 460 Q36 V18 (Online)
GPA: 3.8
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27 Feb 2024, 05:15
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IMO - E
Check from options.
1) 85+58 = 143
2) 69+96 = 165
3) 63+36 = 99
4) 73+37 = 110
5) 74+47 = 121 / Correct
Check from options.
1) 85+58 = 143
2) 69+96 = 165
3) 63+36 = 99
4) 73+37 = 110
5) 74+47 = 121 / Correct
27 Feb 2024, 08:06
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Bookmarks
Let 2-digit number be "ab" = 10a+b
Reverse of this number is "ba"= 10b+a
Sum of these two numbers = 11(a+b) =121
a+b =11
Difference of these two numbers a-b =3
Adding the two equations, we get a =7, b =4
IMO Choice E.
Reverse of this number is "ba"= 10b+a
Sum of these two numbers = 11(a+b) =121
a+b =11
Difference of these two numbers a-b =3
Adding the two equations, we get a =7, b =4
IMO Choice E.
