the 4 which results from 1 2 ´ 8 (or 1 2 of 8) can be reached by dividing 8 by 2; similarly, the 5 which results from 1 3 ´ 15 (or 1 3 of 15), (or a third of fifteen) can be reached by dividing 15 by 3. Generalising this result gives:
the 4 which results from 12´ 8 (or 12of 8) can be reached by dividing 8 by 2;similarly, the 5 which results from 13´ 15 (or 13of 15), (or a third of fifteen) can bereached by dividing 15 by 3.Generalising this result gives: