Quantitative Aptitude - Arithmetic Ability Questions

A is twice as good as B and together they finish a piece of work in 16 days. The number of days taken by A alone to finish the work is

What is the remainder, when 4x4 +10x3-20x2+90 is divided by (x+2) ?

PQRS is a square, M is the mid-point of PQ and N is a point on QR such that NR is two-third of QR. If the area of ΔMQN is 48 cm2 , then what is the length (in cm) of PR ?

Ramesh sold a phone at a loss of 5%. Had he sold it for Rs. 200 more, he would gave gained 15%. To gain 25%, he should sell it for

What is the value of (1/√2) Cot 45° + (1/√3) Cosec 60°?

If x + y = 10 and x2 + y2 = 68, then find xy

If (x+a) is the H.C.F of 2x2+5x-12 and x2+x-12 then find the value of a.

If (a + b)/c = 6/5 and (b + c)/a = 9/2, then what is the value of (a + c)/b?