The key to exercise solutions in chapter 1 - Where's the party? for the textbook Outcomes Beginner - Student's Book with authors Hugh Dellar and Andrew Walkley from National Geographic Learning
Question
Listen and check.
Answer
18 (even numbers / add two each time)
20 (add four each time)
19 (prime numbers: numbers that cannot be divided)
15 (the number you add increases by one each time, so: +2, +3, +4, +5)
