A lent Tk. 4000 to two persons for one year. Some amount was lent at 5% and the rest at 4%. He got Tk. 180 as interest. How much money was lent at 5%?

In an election between two candidates, one got 55% of the total valid votes. 20% of the votes are invalid. If...

A, B and C enter into partnership with investments in the ratio of 5 : 7 : 8. If, at the end of the year A's s...

If 25% of 220 equals 5.5% of w, then w is--

In a class their are 35 boys and 63 girls . Find out the ratio of boys to girls.

If 2x - 1 =9 , then what is the value of 10x -5 ?

A man's age is now 3 times his son's age. Eight years back, the man's age was 5 times his son's age. what is t...