Quantitative Aptitude - Arithmetic Ability Questions

If x + y = 10 and xy = 4, then what is the value of x4 + y4?

In a triangle, the distance of the centroid from the three vertices is 4cm, 6cm and 8cm respectively. Then the length of the smallest median is:

What is the measure of the central angle of the sector whose area is 462 sq cm and radius of the circle is 21 cm?

An engineering student has to secure 25% marks to pass. He gets 47 and fails by 43 marks. What are the maximum marks of the examination?

If two flood gates A and B function simultaneously, the reservoir will be filled iu 6 hours. Gate A fills the reservoir 5 hours faster than gate B. How many hours does the faster flood gate take to fill the reservoir?

In the given figure, PQRS is a square and SRT is an equilateral triangle. What is the value (in degrees) of angle SOR?

A fraction is greater than its reciprocal by 9/20. What is the fraction?

A fan was sold for Rs. 3600 at a loss of 4%. What would be the gain or loss percent ifit was sold for Rs. 4200?