Quantitative Aptitude - Arithmetic Ability Questions

Assuming that the numbers in each of the following figures follow a similar pattern, select the option that can replace the question mark (?) in figure C.

What is the measure of an interior angle of a regular polygon of 10 sides?

The average of 3 consecutive even numbers is A. If next 5 even numbers are added, then what is the average of these 8 numbers?

Two circles touch each other at point X. A common tangent touch them at two distinct points Y and Z. If another tangent passing through X cut YZ at A and XA= 16 cm, then what is the value (in cm) of YZ?

What is the value of sin 75°+ sin 15°?

If a -­ b = 3 and ab =28, then a3 - b3 is

If A is equal to 20% of B and B is equal to 25% of C; then what percent of C is equal to A?

What is the value of tan3A?