Equation Detective – Level 1 – Medium

Four friends — Max, Ruby, Theo, and Sofia — each bought a different item: pizza, salad, burger, or drink.

Each purchase was made on a different day: Monday, Tuesday, Thursday, or Friday.
Each item cost a different amount.

Read more about how to solve these puzzles here

Clues:

1. The person who bought the salad paid £2 less than the one who bought the burger.
2. Ruby didn’t make her purchase on Tuesday or Friday.
3. Theo spent £1 less than Max.
4. The drink cost £5.
5. The total cost of Ruby and Sofia’s items was £15.
6. Theo did not buy the burger or the pizza.
7. The pizza cost £7.
8. Max purchased salad on Monday.
9. Sofia did not buy the drink, nor pizza, nor did she buy anything on Tuesday.