15 times 16 is 240. In symbols: 15 × 16 = 240, and 16 × 15 = 240 too.
15 × 16 means adding 15 to itself 16 times: that is 16 copies of 15, which add up to 240.
15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, ... (keep going to the 16th multiple). The 16th multiple of 15 is 240.
15 × 16 = 15 × 10 + 15 × 6 = 150 + 90 = 240.
Halve one number and double the other: 15 × 16 = 8 × 30 = 240.
240 ÷ 15 = 16
240 ÷ 16 = 15
240 is even. Prime factorization: 2 × 2 × 2 × 2 × 3 × 5.
| Multiplication | Answer |
|---|---|
| 14 × 16 | 224 |
| 16 × 16 | 256 |
| 15 × 15 | 225 |
| 15 × 17 | 255 |
| 15 × 18 | 270 |
| 14 × 15 | 210 |
| 16 × 17 | 272 |
| 13 × 16 | 208 |
See also: factors of 240.
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