Category Archives: numbers

Radix sort with index cards

I showed my kids the radix sort.

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Counting

My five-year-old has been able to rattle off the numbers in order into the teens for a while, but when you ask her to count a set of objects, she can only get up to three consistently. “One, two, three–um–five?” … Continue reading

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An Evening of Math I

My wife has taken on the challenge of homeschooling our children this year. My main participation in this is a weekly math session with the kids in the evening on any subject of my choosing! Tonight was our first session. … Continue reading

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Stupid Numbers, Fun Irrationals

I promised in a previous post (Does pi follow a pattern?) that I would have more to say in a future post about what I call “fun” irrational numbers; Numbers that one of my professors once called “stupid.”  Here it … Continue reading

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Partitions of Graphs I: Partitions of Whole Numbers

I’ve been meaning to blog about this for some time.  I guess that I had just better do it.  But it will be in pieces.  A little at a time.  That’s the way blogs are supposed to be right? Let’s … Continue reading

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Yet more sentences

A: Sentences B and C together have 2 1s, 6 2s, 5 3s, 4 4s, 6 5s, 4 6s, 3 7s, and 2 8s. B: Sentences C and D together have 2 1s, 6 2s, 4 3s, 5 4s, 7 … Continue reading

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This sentence…

This sentence has two ones, three twos, two threes and one four. I thought of that one, then I thought of a smaller one: This sentence has two twos. Someone is sure to have done this before.  Let’s call these … Continue reading

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