Direction: Put a check (/) on the blank if the set of numbers are arranged correctly in
increasing or decreasing order and cross (X) if it is not.

1. 10 900, 11 900, 12 009, 13 009, 14 900

2. 15 123, 15 234, 15 987, 15 567, 15 756

3. 56 401, 55 400, 56 400, 55 401, 57 400

4. 60 000, 70 000, 80 000, 90 000, 100 000

5. 27 400, 26 500, 25 600, 24 700, 23 800​