PK 2020 Q1
1. The diagram shows a shape made from ten squares of side-length 1 cm, joined edge to edge.
What is the length of its perimeter, in centimetres?
- A 14
- B 18
- C 30
- D 32
- E 40

Pink Kangaroo 2020, Question 1. © UK Mathematics Trust. Original paper on ukmt.org.uk
Answer: B 18
Counting the edges of the squares around the shape gives a perimeter of 18 cm.
Solution © UK Mathematics Trust, from the PK 2020 solutions.