Quantitative Aptitude - Arithmetic Ability Questions

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

If A's salary is 40% less than that of B, then how much percent is B's salary more than that of A?

On a certain date, Pakistan has a success rate of 60% against India in all the ODIs played between the two countries. They lost the next 30 ODIs in a row to India and their success rate comes down to 30%. The total number of ODIs played between the two countries is

If x3 – y3 = 81 and x – y = 3, then what is the value of x2 + y2?

If m+n=1, then the value of m3+n3+3mnis equal to

The ratio of number of boys and girls in a class is 2 : 3. The average weight of boys and girls in the class is 18 kg and 21 kg respectively. What is the average weight (in kgs) of all the boys and girls together?

∆PQR is right angled at Q. If sinP = 12/13, then what is the value of tanR?

If each median of an equilateral triangle has a length of 12cm. Then what will be the value of in-radius (in cm) of the equilateral triangle?