Quantitative Aptitude - Arithmetic Ability Questions

If x + 1x = 3, then x18 + x12 + x6 + 1 value is

Both A and B together can complete a work in 20 days and B alone can complete the same work in 36 days. In how many days will A alone complete the work?

The percentage change of a number when it is first decreased by 10% and then increased by 10% is

The ratio of present ages of Ranjini and Shahid is 5:4. After 13 years the ratio of their ages will be 6:5. What is Ranjini's present age?

In a Rhombus ABCD, measure of angle CAB is 30°, what is the measure of angle ABC?

The value of cos220° + cos270°is

In a test, Charan secured 54 marks that was also equivalent to obtaining 72% marks. How many marks was the test out of?

Given: 6x + 2(6-x) > 2x -2 < 5x/2 - 3x/4; then x can take which of the following values?