Quantitative Aptitude - Arithmetic Ability Questions

Choose the one which is odd from the following options.

Select the odd word from the given alternatives.

If the shopkeeper sells an item at Rs 4400 which is marked as Rs 5000, then what is the discount that he is offering?

If a website is selling smartphone at Rs 18,000 which is marked at Rs 25,000, then what is the discount (in %) at which the smartphone is being sold?

The value of x for which the expressions 7x + 13 and 13x - 7 become equal is _____

What is the value of [(cos 7A + cos 5A)÷(sin 7A – sin 5A)]?

Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?

A can do a piece of work in 10 days, B can do it in 12 days and C can do it in 15 days. In how many days will A, B and C finish it, working all together?