Quantitative Aptitude - Arithmetic Ability Questions

P and Q are two alloys which are prepared by mixing tin and lead in the ratio of 12 : 5 and 4 : 3 respectively. If equal quantities of alloys are melted to form athird alloy R, then what is the ratio of tin and lead in alloy R?

A train travelling at the speed of 66 kmph crosses a 300 m long platform in 24 seconds. How long was the train?

A dishonest milkman buys milk at Rs 30 per litre and adds 1/5 of water to it and sells the mixture at Rs 32 per litre. What will be his gain?

If a = √2 + 1, b = √2 - 1 then the value of 1a+1+1b+1 ?

The perimeter of an isosceles triangle is 32 cm and each of the equal sides is 5/6 times of the base. What is the area (in cm2 ) of the triangle ?

(1 + sec 20° + cot 70°)(1 - cosec 20° + tan70°) is equal to

If cosec ­4π/3 = x, then the value of x is

A, B and C can complete the work in 4, 5 and 6 hours respectively. If they all work together and receive Rs. 777 as wages then find the share of A.