13 times 17 is 221. In symbols: 13 × 17 = 221, and 17 × 13 = 221 too.
13 × 17 means adding 13 to itself 17 times: that is 17 copies of 13, which add up to 221.
13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143, 156, ... (keep going to the 17th multiple). The 17th multiple of 13 is 221.
13 × 17 = 13 × 10 + 13 × 7 = 130 + 91 = 221.
221 ÷ 13 = 17
221 ÷ 17 = 13
221 is odd. Prime factorization: 13 × 17.
| Multiplication | Answer |
|---|---|
| 12 × 17 | 204 |
| 14 × 17 | 238 |
| 13 × 16 | 208 |
| 13 × 18 | 234 |
| 13 × 19 | 247 |
| 13 × 15 | 195 |
| 15 × 17 | 255 |
| 11 × 17 | 187 |
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