Five digits and one: Difference between revisions
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== Help == | == Help == | ||
{{Hint| An algebraic solution exists: let | {{Hint| An algebraic solution exists: let <m>x</m> be the mystery number. How do you express the two six digit numbers in terms of <m>x</m>?}} | ||
Current revision as of 15:09, 20 July 2011
Here is a nice place value puzzle I saw on the Maths is Fun website.
Puzzle
I am thinking of a five digit number. If you were to put a "1" at the end of the number you would get a six digit number which is three times the six digit number you get by placing a "1" at the front of my number. What number am I thinking of?
Help
Hint
An algebraic solution exists: let <m>x</m> be the mystery number. How do you express the two six digit numbers in terms of <m>x</m>?
References
Maths is Fun - math and logic puzzles appropriate for math education.