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Interactive · 1 question

If I have seen further it is only by standing on the shoulders of giants.

-Isaac Newton

The fastest way to pick up our Markup Language is to click "history", and look at the source code of an existing post that uses some nifty features.

-Po-Shen Loh

Hint: click "Improve this lesson" to see the source code, and open in a new tab so that you don't lose your place in this exercise!

Which of the following words and symbols occur(s) more than once in the source code of this question?

Choose all correct answers

Interactive · 1 question

If I have seen further it is only by standing on the shoulders of giants. -Isaac Newton

The fastest way to pick up our Markup Language is to look at the source code of an existing post that uses some nifty features. -Po-Shen Loh

Which of the following words and symbols occurs more than once in the source code of this question?

Choose all correct answers

Type a concept, like “slope” or “photosynthesis”.

↑ ↓ to choose · Enter to openSearch explanations and problems