If the operation '*' is defined by a * b = a + b - ab, then 5 * 7 equals :

Find the unit digit in the product : $${\left( {4387} \right)^{245}}$$   $$ \times {\left( {621} \right)^{72}}…

Each member of a club contributes as much rupees and as much paise as the number of members of the club. If the total c…

(12)<sup>3</sup> × 6<sup>4</sup> × 432<sup>-1</sup> = ?

If the difference between the reciprocal of a positive proper fraction and fraction itself be $$\frac{{17}}{{72}}$$ , t…

If in a three digits number the last two digits places are interchanged a new number is formed which is greater than the…

If 4x<sup>2</sup> - 12x + k is a perfect square. then the value of k is ?

A heap of pebbles when made up into group of 32, 40, 72, leaves the remainder 10, 18 and 50 respectively. Find least num…