Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd letter/letters 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.

If tan θ + sec θ = (x – 2)/(x + 2), then what is the value of cos θ?

What is the time taken by a 180 m long train running at 54 kmph to cross a man standing on a platform?

The ratio of angles of a triangle are 1 : 2/3 : 3. Then the smallest angle is

The average of 10 numbers is 30. If at the time of calculation one number was wrongly taken as 36 instead of 69, then what will be the correct average?

Which of the following will give a terminating decimal?

A tap can fill a tank in 20 minutes. If a leakage is capable of emptying the tank in 60 minutes, the tank will be filled in