Here is a sequence of patterns made from square tiles.
Pattern 1: 6 tiles (a central row of 4 and 1 tile above and 1 tile below the center). Pattern 2: 11 tiles (a central row of 7 and 2 tiles above and 2 tiles below the center). Pattern 3: 16 tiles (a central row of 10 and 3 tiles above and 3 tiles below the center).
In the space below, draw pattern number 4.
Work out the total number of tiles to make pattern number 15.
Practise OCR GCSE Maths Sequences (Nth Term) with exam-style questions for Foundation and Higher tier. 80 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.