


36.
A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is: [Section Officers' 2001]
37.
A sum of money lent out at simple interest amounts to Rs. 720 after 2 years and to Rs. 1020 after a further period of 5 years. The sum is: [S.S.C. 2004]
38.
A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is: [S.S.C. 2003]
39.
A certain sum of money at simple interest amounts to Rs. 1012 in 2 1/2 years and to Rs. 1067.20 in 4 years. The rate of interest per annum is:
40.
In how many years will a sum of money double itself at 12% per annum?
41.
At what rate percent of simple interest will a sum of money double itself in 12 years? [S.S.C. 2000]
42.
The rate at which a sum becomes four times of itself in 15 years at S.I. will be:
