Mathematics Past Questions and Answers

Find the sum to infinity of the series \(4+3+9 / 4+27 / 16+\cdots\).

A chord of a circle of radius \(10 \mathrm{~cm}\) is drawn \(8 \mathrm{~cm}\) from the centre of the circle. Find the length of the chord.

Find the equation of the line which passes through \((-2,1)\) and is perpendicular to the line \(4 x-2 y+1=0\)

If a line is parallel to the line \(2 y-r x+4=0\) and perpendicular to the line \(4 y+x-28=0\), then the value of \(\mathrm{r}\) is ____________

\begin{array}{|l|l|l|l|l|l|l|}<br/>\hline Score & 0 & 1 & 2 & 3 & 4 & 5 \\<br/>\hline No of Student & 2 & 8 & 14 & 16 & 12 & 8 \\<br/>\hline<br/>\end{array}<br/>The distribution above shows the scores of sixty (60) students in a class test. What percentage of the students scored at least 3?