7 times 13 is 91. In symbols: 7 × 13 = 91, and 13 × 7 = 91 too.
7 × 13 means adding 7 to itself 13 times: that is 13 copies of 7, which add up to 91.
7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, ... (keep going to the 13th multiple). The 13th multiple of 7 is 91.
7 × 13 = 7 × 10 + 7 × 3 = 70 + 21 = 91.
91 ÷ 7 = 13
91 ÷ 13 = 7
91 is odd. Prime factorization: 7 × 13.
| Multiplication | Answer |
|---|---|
| 6 × 13 | 78 |
| 8 × 13 | 104 |
| 7 × 12 | 84 |
| 7 × 14 | 98 |
| 7 × 15 | 105 |
| 7 × 11 | 77 |
| 9 × 13 | 117 |
| 5 × 13 | 65 |
See also: factors of 91.
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