Let's Count the Triangles

How many triangles are there on the puzzle below?

Let




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You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

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He collects a total of 324 coins.

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All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
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There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.