Mathematics Educations: matematik moden

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Quick Math: Solve Square Numbers End with Five

For example:

15² = 225
25² = 625
35² = 1225
45² = 2025
55² = 3025

.....

If the first digit is X and the second digit is 5, then the last 2 digits of the answer will be 25, and the preceding digits will be X × (X + 1).

For Example:
65² = _ _ 2 5

Then, the first digit is 6. So, 6 × (6 + 1) = 6 × 7 = 42.
Finally, the answer is 4225.

65² = 4 2 2 5

So, want to try...?

75² = ____
85² = ____
95² = ____
105² = ____

Reply the answers at comment :)