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Find the missing number in the triangular number pattern.

A brain teaser puzzle on lined notebook paper showing a triangular number pattern with a missing number at the bottom, indicated by a question mark and arrow. The puzzle is titled "Brain Teaser #2 Number Patterns" and includes a cartoon brain character.

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ID: #576102

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Show Answer Key & Explanations Step-by-step solution for: Free Math Puzzles | Thinkwell Homeschool

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