Five digits and one: Difference between revisions
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Oscarlevin (talk | contribs) Created page with '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 w...' |
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{{Hint| An algebraic solution exists: let $x$ be the mystery number. How do you express the two six digit numbers in terms of $x$?}} | {{Hint| An algebraic solution exists: let $x$ be the mystery number. How do you express the two six digit numbers in terms of $x$?}} | ||
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Revision as of 11:19, 3 June 2010
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 $x$ be the mystery number. How do you express the two six digit numbers in terms of $x$?
References
Maths is Fun - math and logic puzzles appropriate for math education.