Sequences and Series

Help Questions

SSAT Upper Level Quantitative › Sequences and Series

Questions 1 - 10
1

What is the value of is this sequence?

Explanation

This is a geometric sequence since the pattern of the sequence is through multiplication.

You have to multiple each value by to get the next one.

The value before is so .

2

What is the value of is this sequence?

Explanation

This is a geometric sequence since the pattern of the sequence is through multiplication.

You have to multiple each value by to get the next one.

The value before is so .

3

What is the value of is this sequence?

Explanation

This is a geometric sequence since the pattern of the sequence is through multiplication.

You have to multiple each value by to get the next one.

The value before is so .

4

Three consecutive integers have sum . What is their product?

Explanation

Let the middle integer of the three be . The three integers are therefore

, and they can be found using the equation

This contradicts the condition that the numbers are integers. Therefore, three integers satisfying the given conditions cannot exist.

5

Three consecutive integers have sum . What is their product?

Explanation

Let the middle integer of the three be . The three integers are therefore

, and they can be found using the equation

This contradicts the condition that the numbers are integers. Therefore, three integers satisfying the given conditions cannot exist.

6

Three consecutive integers have sum . What is their product?

Explanation

Let the middle integer of the three be . The three integers are therefore

, and they can be found using the equation

This contradicts the condition that the numbers are integers. Therefore, three integers satisfying the given conditions cannot exist.

7

Set R consists of multiples of 4. Which of the following sets are also included within set R?

Set W, containing multiples of 8.

Set X, containing multiples of 2.

Set Y, containing multiples of 6.

Set Z, containing multiples of 1.

Set Q, containing multiples of 7.

Explanation

The easiest way to solve this problem is to write out the first few numbers of the sets.

Set R (multiples of 4):

Set W (multiples of 8):

Set X (multiples of 2):

Set Y (multiples of 6):

Set Z (multiples of 1):

Set Q (multiples of 7):

Given that Set W is the only set in which the entire set of numbers is reflected in Set R, it is the correct answer.

8

Set R consists of multiples of 4. Which of the following sets are also included within set R?

Set W, containing multiples of 8.

Set X, containing multiples of 2.

Set Y, containing multiples of 6.

Set Z, containing multiples of 1.

Set Q, containing multiples of 7.

Explanation

The easiest way to solve this problem is to write out the first few numbers of the sets.

Set R (multiples of 4):

Set W (multiples of 8):

Set X (multiples of 2):

Set Y (multiples of 6):

Set Z (multiples of 1):

Set Q (multiples of 7):

Given that Set W is the only set in which the entire set of numbers is reflected in Set R, it is the correct answer.

9

Set R consists of multiples of 4. Which of the following sets are also included within set R?

Set W, containing multiples of 8.

Set X, containing multiples of 2.

Set Y, containing multiples of 6.

Set Z, containing multiples of 1.

Set Q, containing multiples of 7.

Explanation

The easiest way to solve this problem is to write out the first few numbers of the sets.

Set R (multiples of 4):

Set W (multiples of 8):

Set X (multiples of 2):

Set Y (multiples of 6):

Set Z (multiples of 1):

Set Q (multiples of 7):

Given that Set W is the only set in which the entire set of numbers is reflected in Set R, it is the correct answer.

10

Find the term of the arithmetic sequence:

Explanation

To find any term in an arithmetic sequence, use the following formula:

  • is the term we want to find
  • is the first term of the sequence
  • is the number of the term we want to find
  • is the common difference

For this sequence,

Now, plug in the information to find the value of the 8th term.

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