Quantitative Aptitude - Arithmetic Ability Questions

If the selling price is Rs 855 after getting a discount of 5%, what was the marked price?

If a2+b2+c2=14 and a+b+c=6, then the value of ab+bc+ca is,

At 24% discount the selling price of a washing machine is Rs 38000, what is the selling price if the discount is 40%?

If x = 2+32-3, then what is the value of x2+x-9 ?

The Simplified form of (b3x2a4z3)*(b4x3a3z2)/(a2b4z3) is

An aeroplane flying horizontally at a height of 3 Km. above the ground is observed at a certain point on earth to subtend an angle of 60°. After 15 sec flight, its angle of elevation is changed to 30°. The speed of the aeroplane (taking √3 = 1.732) is

If x+19x=4, then 9x2+19x2 is

What is the simplified value of cosec 2A + cot 2A?