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Question
If two digit integer M and N are positive and have same digits, but inreverse order, which of the following cannot be the sum of M and N?
a) 181
b)165
c) 121
d) 99
e) 44
Hi Shruti~
I hope you aren't looking for an analytical answer to this problem because I can tell you the answer by the process of elimination:
165 = 87 + 78
121 = 83 + 38
99 = 90 + 09
44 = 22 + 22
and 181 cannot be written as such...
Math Prof
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Answers by Expert:
Sherry Wallin
Expertise
I can answer most questions up through Calculus and some in Number Theory and Abstract Algebra.
Experience
I have had my Bachelor's Degree since 1987 and have been a teacher since 1988. I earned my Masters Degree in Mathematics May 2010. I have been teaching at the same community college since 2002.
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I have taught 12 years at the community college level, medical college, and technical college as well as a high school instructor and alternative education instructor and charter school instructor.
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Master's GPA 3.56
Bachelor's GPA 3.34
Post grad work not degree related GPA 4.0
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