Quantitative Aptitude - Arithmetic Ability Questions

Instead of multiplying by 25, a student multiplies that number by 52 and gets 324 more than correct answer. Then that number is

Find the greatest number among 213, 312, 1, 516

A student, by mistake, wrote 64 in place of 46 as a number at the time of finding the average of 10 given numbers & got the average as 50. The correct average of the numbers is

If P + 1P+2 = 1, then the value of P+23+1P+23-3 ?

What is the value of [(sin 59° cos 31° + cos 59° sin 31° )÷(cos 20° cos 25° – sin 20° sin 25° )]?

The point R(a,b) is first reflected in origin to R1 and R1 is reflected in x-axis to (-3,4). The co-ordinates of point R are

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

One of four words is a class to which the other three belong. Identify the class.