Quantitative Aptitude - Arithmetic Ability Questions

If a, b and c are positive integers such that 1a+1b+1c+12 = 1623, then what is the mean of a, b and c?

On dividing 24a2b2 by 6b2, we will get

If (x + y + z) = 12, xy + yz + zx = 44 and xyz = 48, then what is the value of x3 + y3+ z3?

Average of 11 numbers is 7. If every number is doubled, then what will be the new average of the numbers?

If a person walks at 15 km/hr instead of 9 km/hr, he would have walked 3 km more in the same time. What is the actual distance (in kms) travelled by him? 

If Cosec θ = 17/8, then what is the value of Cos θ?

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

If sin 3θ sec 2θ = 1, then what is the value of [3 tan2(5θ/2) – 1]?