Quantitative Aptitude - Arithmetic Ability Questions

In a Rhombus ABCD, measure of angle CAB is 35°, what is the measure of angle ABC?

The number of trees in a town is 17640. If the numbers of trees increases annually at the rate of 5%, then how many trees were there 2 years ago?

Two baskets together have 640 oranges. If (1/5)th of the oranges in the first basket be taken to the second basket. The number of oranges in the first basket is

The population of a town is 350000. It increases annually at the rate of 20%. What will be the population after 2 years?

If 2x + 3y – 5z = 18, 3x + 2y + z = 29 and x + y + 3z = 17, then what is the value of xy + yz + zx?

If x+1x=-2,then the value of x7+1x7

P, Q and R alone can complete a work in 12, 15 and 20 days respectively. In how many days will they together complete the same work?

Determine the value of  'a' which satisfies the equation 9a + 40a = 41a