Look at this series: 2, 6, 18, 54, ... What number should come next?

This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.

This is a simple subtraction series. Each number is 35 less than the previous number.

In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on.

This is a simple addition series. Each number increases by 2.

This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.

In this simple subtraction series, each number decreases by 0.4.

8 x 1 - 2 = 6
6 x 2 - 3 = 9
9 x 3 - 4 = 23
23 x 4 - 5 = 87
87 x 5 - 6 = 429 ...

Parsley, basil, and dill are types of herbs. Mayonnaise is not an herb.

An ounce measures weight; the other choices measure length.

Tyre, steering wheel, and engine are all parts of a car.