Toby, Dave & Ian Explain XKCD

Here’s one for the mathematics geeks.

The Author is making a visual pun on the similarity between the square root operator and the division operator. If you follow from left to right you will see the “three times the square root of 81” turn into “81 divided by three” when he drops the multiplication operator. In this particular example, the two numbers multiplied is the same as dividing the second number squared by the first number. This is not always the case.

Notes

1. xkcdexplainedexplained reblogged this from xkcdexplained and added:

   Is that long division? I thought everybody forgot long...summer after 3rd grade

2. elderwind liked this
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5. tannmansan reblogged this from xkcdexplained and added:

   time I didn’t even smile at an xkcd comic.

6. catlion reblogged this from xkcdexplained and added:

   passion for math-test jokes.

7. jiliannoelle liked this
8. tennotenshi reblogged this from xkcdexplained and added:

   really awesome :D

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