Quantitative Aptitude - Arithmetic Ability Questions

If x = 1 + √2 + √3 , then the value of 2x4 - 8x3 - 5x2 + 26x - 28 is

One of the two inlet pipes works twice as efficiently as the other. The two, working alongside a drain pipe that can empty a cistern all by itself in 8 hours, can fill the empty cistern in 8 hours. How many hours will the less efficient inlet pipe take to fill the empty cistern by itself?

If sin8 θ + cos8 θ – 1 = 0, then what is the value of cos2 θ sin2 θ (If θ ≠ 0 or π/2)?

12 men and 16 women together can complete a work in 4 days. It takes 80 days for one man alone to complete the same work, then how many days would be required for one woman alone to complete the same work?

BD and CE are two medians of the triangle ABC. If EO = 7 cm, then the length of CE is

The point where the 3 medians of a triangle meet is called

The sum of 15 observations of a data is (434 + x). If the mean of the data is x, then the value of x is

Which of the following is NOT prime number?