Quantitative Aptitude - Arithmetic Ability Questions

Find the odd one out.

In the following question, select the odd letters from the given alternatives.

If 3 tan θ = cot θ where 0 < θ < π/2, then what is the value of θ ?

Two water squash mixtures, the first with a water-to-squash ratio of 5:1 and the letter with a ratio of 3:1 are blended in the ratio 3:2. What is the final water : squash ratio in the blend?

A wholesaler sells a watch to a retailer at a gain of 20% and the retailer sells it to a customer at a loss of 10%. If the customer pays Rs 874.8, what had it cost the wholesaler?

Junko sold an item for Rs. 220 at a loss of 12%. By how much should she have raised the price to make a profit of 10% ?

A missile travels at 1260 km/h. How many metres does it travel in one second?

If x+y+z = 0, then what is the value of x23z+y33xz+z23x ?