SIMPLE INTEREST

WHAT WILL BE THE SIMPLE INTEREST ON RS 4000 AT 12.50%PER ANNUM FOR THE PERIOD FROM 4TH FEB 2005 TO 18 TH APRIL 2005?

ANSWER:RS 100

A SUM OF MONEY AT THE SIMPLE INTEREST AMOUNT TO RS 815 IN 3 YEARS &TO RS 854 IN 4 YEARS.THE SUM IS?

ANSWER:RS 698

THE SIMPLE INTEREST ON RS 10 FOR 4 MONTHS AT THE RATE OF 3 PAISE PER RUPEE PER MONTH IS?

ANSWER:RS 120
A SUM BECOMES ITS DOUBLE IN 10 YEARS.FIND THE ANNUAL RATE OF SIMPLE INTEREST?

ANSWER:10%

THE RATE AT WHICH A SUM BECOMES FOUR TIMES OF ITSELF IN 15 YEARS AT S.I WILL BE?

ANSWER:20%