How to work with number series

The pattern in this series is add , then divide by . The blank is then .

The pattern is to multiply by each time. The last operation is

The pattern in this series is to add , then subtract . The last operation is .

The pattern for this series is multiply by , then add (Pay attention to the numbers after the blank! The first three are deceiving.) The operation to fill in the blank is:

The pattern is to add each time. The last operation is

The pattern is divide by , then add . The operation before the blank is .

The pattern is divided by , then add . The last operation is .

The pattern is multiply by , then add . The last operation is .

The pattern is to divide by each time. The last operation is .

The pattern is to divide by each time. The last operation is .