How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm?

The smallest 5-digit number divisible by 41 is:

Cost price of 25 chairs equals the selling price of 20 chairs. Find the profit %.

The number of pairs of natural numbers the difference of whose squares is 45 will be –

Two buses travel to a place at 45 km/hr and 60 km/hr respectively. If the second bus takes 5½ hours less than the first for the journey, the length of the journey is:

If $$ {x^2-12x+33=0}$$, then what is the value of $${(x-4)^2+[{1\over({x-4})^2}}]$$.

$$ {3tan^{2}30°}-{4\over 3}{sin^{2}60°}- {1\over2}{cosec^{2}45°}+{4\over3}{sin^{2}90°=?}$$

If circumference of first circle is 132 cm and circumference of second circle is 110 cm then find the difference between area of both the circle?