Quantitative Aptitude - Arithmetic Ability Questions

If 3a=4b=6c and a+b+c=279 then a2+b2+c2 is equal to

Robin can do a work in 10 hours. Pradeep and Robin together can do the same work in 4 hours. Pradeep and Nitin together can do the samework in 5 hours. In how many hours Nitin alone can complete the same work?

Select the odd word/letters/number/number pair from the given alternatives.

Findout the odd word/letters/number/number pair from the given alternatives.

Find out the odd word/letters/number/number pair from the given alternatives.

If 2x+4-2x+2=3, then the value of x?

The two equal sides of an isosceles triangle is 20 cm each and the third side is 30 cm. What is the area(in cm2) of the triangle?

If 31x + 31y = 403, then what is the average of x and y?