If k is a positive two-digit integer, what is the tens digit of k?
1) The sum of the tens digit of k and the units digit of k is 5.
2) The tens digit of k + 6 is 3.
The OA is the option C.
How can I solve this DS question? I don't know what to do. Help, please.
If k is a positive two-digit integer, what is the tens
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Statement 1:M7MBA wrote:If k is a positive two-digit integer, what is the tens digit of k?
1) The sum of the tens digit of k and the units digit of k is 5.
2) The tens digit of k + 6 is 3.
Case 1: k=14, with the result that the tens digit of k is 1
Case 2: k=23, with the result that the tens digit of k is 2
Since the tens digit can be different values, INSUFFICIENT.
Statement 2:
Make a list of option for k+6:
k+6 = 30, 31, 32, 33, 34, 35, 36, 37, 38, 39.
To yield options for k, subtract 6 from every value in the list above:
k = 24, 25, 26, 27, 28, 29, 30, 31, 32, 33.
Since the tens digit of k can be 2 or 3, INSUFFICIENT.
Statements combined:
In the blue list above, only k=32 is such that the sum of the digits is 5.
Thus, k=32, with the result that the tens digit of k is 3.
SUFFICIENT.
The correct answer is C.
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Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
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