Square ending in 5

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Squaring Numbers Ending in 5
Quick multiplication trick
1by1 2by2 Multiplication

Squaring any number that ends in 5 is a simple two-step process:

  1. Multiply the first digit by the next higher digit. For example, for 35², calculate:
    3 × 4 = 12
  2. Append 25 to the result from step 1. Therefore:
    35² = 1225 = 1225

With this quick trick, squaring numbers like 15, 25, 35, and so on becomes effortless!

Practice now
  • 5² = [0×1]25 = [0]25 = 25
  • 15² = [1×2]25 = [2]25 = 225
  • 25² = [2×3]25 = [6]25 = 625
  • 35² = [3×4]25 = [12]25 = 1225
  • 45² = [4×5]25 = [20]25 = 2025
  • 55² = [5×6]25 = [30]25 = 3025
  • 65² = [6×7]25 = [42]25 = 4225
  • 95² = [9×10]25 = [90]25 = 9025