Quantitative Aptitude - Arithmetic Ability Questions

If a + b = 8 and ab =15, then a3 + b3 is

The area of a circle is 346.5 cm². Find its radius (in cm).

If x=2+3,then the value of x2-x+1x2+x+1 is

If a triangle has its orthocenter and centroid of equal length, then which of the following is TRUE about the triangle?

The first and last terms of an arithmetic progression are 29 and -49. If the sum of the series is -140, then it has how many terms?

The ratio of present ages of Ramita and Satyajit is 9:7. After 9 years the ratio of their ages will be 5:4. What is Ramita's present age?

The ratio of sand to gravel in a mixture is 17:8 while that between gravel and cement is 6:17. What is the ratio of sand to cement in the mixture?