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Brain Teaser #2: Find the missing number in the number pattern diagram.

$A pyramid-shaped number pattern puzzle with missing number indicated by a question mark, featuring a brain character on a sticky note labeled "Brain Teaser #2 Number Patterns" on lined notebook paper.$

A pyramid-shaped number pattern puzzle with missing number indicated by a question mark, featuring a brain character on a sticky note labeled "Brain Teaser #2 Number Patterns" on lined notebook paper.

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Looking at the bottom section of the diagram, I can see that the missing number is positioned below two 10s from the row above. According to the Pascal's Triangle pattern I've identified, each number is the sum of the two numbers diagonally above it.

Since the missing number is directly below two 10s, it should be the sum of those two numbers: 10 + 10 = 20.

The arrow in the diagram also points to this position, confirming that this is the location of the missing number we need to find.

Therefore, the value of the missing number is 20.

Parent Tip: Review the logic above to help your child master the concept of math puzzle worksheet high school.

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