Faktoria, mipangilio, michanganyiko

4!=1×2×3×4\displaystyle 4! = 1 \times 2 \times 3 \times 4, kama slaidi inavyoonyesha. 2nd F na 4 hukokotoa n!\displaystyle n!. Andika 4, bonyeza second F, faktoria, na sawa na: 24.. 2nd F na 6 huhesabu mipangilio. Andika 10, bonyeza second F, n P r, andika 3, na bonyeza sawa na: 720.. 2nd F na 5 huhesabu michanganyiko. Andika 5, bonyeza second F, n C r, andika 2, na bonyeza sawa na: 10..