Number sequences
Practise fixed steps, decreasing sequences, doubling, halving, and simple alternating patterns.
How to solve this
- Subtract one term from the next to test for a fixed step: 1200, 1300, 1400 adds 100 each time.
- If the numbers grow quickly, check for doubling: 250, 500, 1000, 2000 doubles each term.
- For decreasing sequences, the step is negative; 10,000, 9500, 9000 subtracts 500 each time.
Examples
1200, 1300, 1400, __
1500
10,000, 9500, 9000, __
8500
250, 500, 1000, 2000, __
4000