SOLUTION: For how many two digit positive numbers will doubling the tens digit yield a two digit number that is double the original number?
A)none B)one C)two D)three E)four
I thought
Algebra.Com
Question 991274: For how many two digit positive numbers will doubling the tens digit yield a two digit number that is double the original number?
A)none B)one C)two D)three E)four
I thought 10~90 can be those numbers. But maximum there is four. Please help me out.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
No, not 10, 20, ... , 90. Because 50 and larger yields a three digit result when doubled. The only ones that work are 10, 20, 30, and 40.
John
My calculator said it, I believe it, that settles it
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