Final answer:
The given numbers are decreasing using a simple subtraction formula where each number is subtracted from the previous one.
Step-by-step explanation:
The given numbers 70, 52, 40, 33, 30, 31 can be observed for a pattern of decreasing values. The formula being used is a simple subtraction formula, where each number is subtracted from the previous one. Let's look at the step-by-step explanation:
- Start with the first number 70.
- Subtract the second number 52 from the first number: 70 - 52 = 18.
- Subtract the third number 40 from the second number: 52 - 40 = 12.
- Continue this process for the remaining numbers.
- Finally, subtract the last number 31 from the second-to-last number 30: 30 - 31 = -1.
Therefore, the given numbers are decreasing by the subtraction of each number from the previous one.