Thinking and Working Mathematically (Problem Solving, Reasoning, Communication)
Question 1 of 5
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Free Checkpoint Maths Q & A Practice 1 of 5 free Checkpoint-standard exercises in this section
Edward makes a sequence of tile patterns. The first three patterns are shown. Each pattern is a rectangle of yellow tiles surrounded by a border of blue tiles, and the sequence continues in the same way.

Pattern 1 Pattern 2 Pattern 3


One pattern in the sequence uses exactly 90 blue tiles. How many yellow tiles are in that pattern?
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