Quantitative Aptitude - Arithmetic Ability Questions

P and Q together can make a door in 12 days. They started the work together but after 8 days P left the work. The remaining work is completed by Q alone in 7 more days. In how many days can P alone complete the entire work?

If x2+5x+6 = 0, then the value of 2xx2-7x+6 is

If 5 - 2x ≥ 4 - x and 3(2 - x) > 2 - 4x; then x can take which of the following values?

What is the third proportional to 10 and 25?

The diagonals of two squares are in the ratio 5:2.The ratio of their area is

If XY = a+23 and YX = 13, then find the value of X2 + Y2X2 - Y2.

Select the odd letters from the given alternatives.

What is the value of [tan (90 – A) + cot (90 – A)]2/[2 sec2(90 – 2A)]?