Quantitative Aptitude - Arithmetic Ability Questions

If (x + 1/x) = 3, then x8+1x8 is equal to

Nine students of a class contribute a certain sum of money. Seven of them gave Rs. 50 each and the other two gave respectively Rs. 50 and Rs. 90 more than the others. The average contribution of the class of 9 students is

In how many different ways can the letters of the word 'RITUAL' be arranged?

The marked price of an article is 60% more than its cost price. What maximum discount percentage can be offered by the shopkeeper to sell his article at no profit or no loss?

Rs.7750 is divided among X, Y and Z such that 3 times of X's share is equal to 5 times of Y's share which is equal to 2 times of Z's share. What is the share (in Rs) of Z?

At what time between 4 o'clock and 5 o'clock will the two hands of the clock be at the right angle to each other for the first time?

Solve the following : -1/4 { -45 - (-96) / (-32)} = ?

In a container, there is 960 ltr of pure milk from which 48 ltr of milk is replaced with 48 ltr of water, again 48 ltr milk is replaced by same amount of water, as this process is done once more. Now, what is the amount of pure milk?