History of Hindu Mathematics: A Source Book v2.c17.s7.62

v2.c17.s7.62

**Mahâvîra's Rules.** Certain interest problems treated by Mahâvîra lead to simple simultaneous equations involving several unknowns. In these problems certain capital amounts (c₁, c₂, c₃, . . .) are stated to have been lent out at the same rate of interest (r) for different periods of time (t₁, t₂, t₃, . . .). If (i₁, i₂, i₃, . . .) be the interests accrued on the several capitals, $i₁ = rt₁c₁/100, i₂ = rt₂c₂/100, i₃ = rt₃c₃/100, . . . .$