Quantitative Aptitude - Arithmetic Ability Questions

Findout the odd word/letters/number/number pair from the given alternatives.

sinA/(1 + cos A) is equal to

If the shopkeeper sells an item at Rs 1250 which is marked as Rs 1500, then what is the discount he is offering?

If P = 22 + 62 + 102 + 142 + ... 942 and Q = 12 + 52 + 92 + ... 812, then what is the value of P – Q?

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is :

A man starts walking at 6.30 a.m. and wants to cover a distance of 30km. His initial speed is 6 kmph and after covering three-fifth distance, he reduces his speed by 2 kmph. At what time will he complete his walk?

P and Q can complete a task in 50 and 20 days respectively. In how many days can they complete 70% of the task if they work together?

What is the value of 5.6x0.36+0.42x3.20.8 x 2.1 ?