Count in Twos, Fives, and Tens

5 questions0m 0s

Learn the skill

Find the size of the jump between nearby numbers. Keep adding that same amount. Check every jump, not just the last one.

Worked example

10, 15, 20 increases by 5 each time: 10 + 5 = 15 and 15 + 5 = 20. The next number is 25.

1. 2, 4, 6, 8, __ Answer

2. 5, 10, 15, __ Answer

3. 10, 20, 30, __ Answer

4. 12, 14, __, 18 Answer

5. 20, 25, 30, __ Answer