Quantitative Aptitude - Arithmetic Ability Questions

Select the odd number from the given alternatives.

If xy+yz+zx = 1, then the value of (1+y2)(x+y)(y+z) ?

If 1aa2+1 = 3, then the value of a6+1a3 is

The HCF of two numbers is 12 and their LCM is 72. If one of the two numbers is 24, then the other number is

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

If (6x ­- 5) = (4x + 7), then the numerical value of (x + 1)3  is

What is the value of [(cos 7A + cos 5A)÷(sin 7A – sin 5A)]?

The value of cos220° + cos270°is