Specific Tricks Level 7: Squares ending in 5 (2d). ending-5 square.
1. Prefix times next
1.
Multiply the prefix by its next integer.
2. Attach 25
2.
Use 25 as the final two digits.
3. Read answer
3.
Read the completed square.
Multiply the prefix by its next integer.
Use 25 as the final two digits.
Read the completed square.