Find the simple interest rate percent annum at which N1000 accumulates to N1240 in 3 years. 

The pie chart shows the income of a civil servant in month. If his monthly income is N6,000. Find his monthly basic salary. 

If x is positive real number, find the range of values for which \(\frac{1}{3x}\) + \(\frac{1}{2}\) > \(\frac{1}{4x}\) 

Find the value of x if \(\frac{\sqrt{2}}{x + \sqrt{2}}\) = \(\frac{1}{x - \sqrt{2}}\) 

A binary operation x is defined by a x b = a\(^b\). If a x 2 = 2 - a, find the possible values of a?