- Take a 2-digit number beginning with 9.
- Subtract it from 100.
- Subtract the difference from the original number:

this is the first part of the answer. - Square the difference: this is the last part of the answer.

#### Example:

- If the number is
**96**, subtract: 100 - 96 = 4, 96 - 4 = 92. - The first part of the answer is 92 _ _ .
- Take the first difference (4) and square it: 4 × 4 = 16.
- The last part of the answer is _ _ 16.
- So
**96 × 96 = 9216**.

** See the pattern?**

- For 98 × 98, subtract: 100 - 98 = 2, 98 - 2 = 96.
- The first part of the answer is 96 _ _.
- Take the first difference (2) and square it: 2 × 2 = 4.
- The last part of the answer is _ _ 04.
- So
**98 × 98 = 9604**.

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