Quantitative Aptitude - Arithmetic Ability Questions

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

If the number 247_679 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be

What is the HCF (highest common factor) of 77 and 275?

If x2 + ax + b, when divided by x - 3, leaves a remainder of 22 and x2 + bx +a, when divide by x - 3, leaves a remainder of 24, then a + b = ?

The average of 17 results is 60. If the average of first 9 results is 57 and that of the last 9 results is 65, then what will be the value of 9th result?

If an equilateral triangle has side 12 cm, then what is the difference (in cm) between the circumradius and inradius?

2sin[(C+D)/2].sin[(D­-C)/2] is equal to

If x = x2+11 2 - 2, then x3 + 5x2 + 12x is