At what rate percentage per annum simple interest will a sum triple itself in 20 years.

At what rate percentage per annum simple Interest will a sum triple itself in 16 years?

At what rate per cent per annum simple interest will a sum treble itself in 16 years?

At what rate per cent per annum simple interest will a sum double itself in 10 years?

At what rate per cent per annum simple interest will a sum double itself in 10 years?

At which rate percent per annum simple interest will a sum triple itself in 16 years? (a) 12% (b) 10.5% (c) 11.5% (d) 12.5%

At what rate per cent per annum simple interest will a sum double itself in 8 years ?

At what rate percent per annum simple interest will a sum double itself in 10 years? 8% (b) 10% 12% (d) 12(1)/(2)%

At what rate percent per annum simple interest will a sum double itself in 10 years? (a) 8% (b) 10% (c) 12% (d) 12 1/2%

At what rate of simple interest per annum will a sum triple itself in 8 years ? A) 12.5% B) 33.3% C) 10% D) 25%