Quantitative Aptitude - Arithmetic Ability Questions

What is the value 32cos 39sin 51-sin239 + sin251

If x + y + z = 0, then what is the value of (3y2 + x2 + z2 )/(2y2 – xz)?

Find out the odd word/letters/number/number pair from the given alternatives.

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

When a number x is divided by a divisor it is seen that the divisor = 4 times the quotient = double the remainder. If the remainder is 80 then the value of x is

A Lawn roller makes 20 revolutions in one hour. The radius it runs through 25 minutes is

The average revenues of 7 consecutive years of a company is Rs 79 lakhs. If the average of first 4 years is Rs 74 lakhs and that of last 4 years is Rs 86 lakhs, what is the revenue for the 4th year?

In the following question, select the missing number from the given series.
 
1912, 2012, 2133, 2277, 2446, ?