15 times 15 is 225. In symbols: 15 × 15 = 225 (15 squared).
15 × 15 means adding 15 to itself 15 times: that is 15 copies of 15, which add up to 225.
15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, ... (keep going to the 15th multiple). The 15th multiple of 15 is 225.
15 × 15 = 15 × 10 + 15 × 5 = 150 + 75 = 225.
225 ÷ 15 = 15
225 is odd and a perfect square. Prime factorization: 3 × 3 × 5 × 5.
| Multiplication | Answer |
|---|---|
| 14 × 15 | 210 |
| 15 × 16 | 240 |
| 15 × 17 | 255 |
| 13 × 15 | 195 |
See also: factors of 225 · 15 squared.
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.