How to work with number series - HSPT Quantitative

Each number is double the value of the preceding number.

The series increases by 7, then 2, then 7 again. So the next increase should continue the pattern and increase by 2.

The number series increases by 8, then decreases by 3, then increases by 8 again. The 5th number should continue the pattern and be a decrease of 3. The answer is .

The pattern is add , subtract . The last operation is .

The pattern is subtract , divide by . The last operation is .

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

The pattern in this series is perfect squares:

...

The pattern is add , then subtract .

The last operation is .

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

The general pattern for this one is subtract each time, but a is placed between each element. Ignoring the 's, the last operation is .

The pattern is to multiply by and then to multiply by .

The last operation is .

The pattern for this series is to multiply by each time.

The last operation is .

The pattern is divide by , then subtract . The last operation is .

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

The pattern is to divide by three each time. For the last operation, .

Each element in the series adds a number that is one more than the last:

The pattern for this series is to add each time. The last operation is .

In this series, a number is subtracted each time. That number always increases by :

...

The last operation is:

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