Here one finds the treatment of joint annuities on several lives, the inheritance of annuities, problems about the fair division of the costs of a tontine, and other contracts in which both age and interest on capital are relevant.
Dito isa na nahahanap ang paggamot ng pinagsamang annuities sa ilang buhay, ang mana ng annuities, problema tungkol sa makatarungang paghahati ng gastos ng isang tontina, at iba pang mga kontrata na kung saan na pareho ng edad at interes sa kapital ay may kaugnayan.