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Math patterns

# Patterns with shapes

## Problem

In the following pattern, every second shape is filled in, and every fourth shape is a square.
Sequence of 9 numbered shapes 1. hollow cross 2. filled-in cross 3. hollow cross 4. filled-in square 5. hollow cross 6. filled-in cross 7. hollow cross 8. filled-in square 9. hollow cross
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Which two of the following statements are true?