Find the pattern. Look at the difference between consecutive terms.

• 89 512 − 89 012 = 500 (decrease by 500)
• 90 012 − 89 512 = 500
• Working backwards: 90 012 + 500 = 90 512
• 90 512 + 500 = 91 012

Final Answer: 91 012, 90 512