Quantitative Aptitude - Arithmetic Ability Questions

If 15% of x is three times of 10% of y, then x:y = 

If A = 0.216 + 0.0080.36+0.04-0.12 & B = 0.729-0.0270.81+0.09+0.27, then what is the value of A2+B22 ?

A fraction becomes 6/5 when 5 is added to its numerator and becomes 1/2 when 4 is added to its denominator. What will be the value of the fraction?

Calculate the value of 61681x61681-31681x3168130000

Δ DEF is right angled at E. If m∠D = 30°, what is the length of DE (in cm), if EF = 6√3 cm?

The marked price of an article is 10/7 of the cost price and the selling price of that article is 4/5 of the marked price. What is the profit percentage?

What is the simplified value of sin2(90–θ)–[sin(90–θ)sinθ/tanθ]?

If ab = 21 and a+b2a-b2 = 254,then the value of a2+b2+3ab