Quantitative Aptitude - Arithmetic Ability Questions

If x=aCosθCosΦ, y = aCosθSinΦ and z= aSinθ, then the value of x2+ y2 + z2 is

If 1aa2+1 = 3, then the value of a6+1a3 is

If the population of a town increases by 25% in the first year and increases by 36% in the second year, then what is the average rate (in percentage)of increase in the population?

If 'Q ' means ' +', 'J ' means ' X',T ' ' means '- ' and 'K ' means '÷ ', then what is the value of18K3Q7J ?

Δ LMN is right angled at M. If m∠N = 60°, then Tan L =______.

If x = 2 +√3, y = 2 – √3 and z = 1, then what is the value of (x/yz) + (y/xz) + (z/xy) + 2 [(1/x) + (1/y) + (1/z)]?

The diameter of a circle is 28 cm find its area?

Ramu can row 9 kmph in still water. It takes him twice as long to row up as to row down. Find the rate of stream.