Quantitative Aptitude - Arithmetic Ability Questions

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

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

A boy crosses a 300 metres wide road in 30 seconds. What is his speed (in km/hr)?

If a+1a2 = 3, then the value of a18+ a12+a6 + 1 is

If y=2secθ and x=3tanθ then x29-y24 is

The least number, which when divided by 5, 6, 7 and 8 leaves a remainder 3 in each case, but when divided by 9 leaves no remainder, is:

If cos4θ-sin4θ=13 then the value of tan2θ is

A shopkeeper increases the price of an object by 40% and then sells it at 25% discount on the marked price. If the selling price of such an object be Rs. 2100, its cost price for the shopkeeper was ?