A bank offers 20% compound interest per half year. A customer deposits Rs 2800 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is ______.

If the radius of a circle is increased by 17% its area increases by ______.

If 2 + 2x < 3 + 5x and 3(x -­ 2) < 5 -­ x; then x can take which of the following values?

If 13x2 = 172 - 92, find the value of x?

The average marks of 56 students is shown as 60. It includes a wrong entry of 92 marks instead of 29 marks. The correct average is _____ .

If 7/8th of 5/4th of a number is 315, then 5/9th of that number is _____

If (6x ­- 1) -­ (8x -­ 5) = 7, then the value of x is _______ .

What has 4 eyes but can't see?