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Level 5-6 Algebra - nth Term
An understanding of maths will help you in everyday life.

Level 5-6 Algebra - nth Term

Discovering algebra is a big part of KS3 Maths. In algebra, we use letters instead of numbers. For example, the letter 'n' (often in italics) shows where a term is in a sequence, and we call it the 'nth' term.

Figuring out the rule for a number pattern can be easy or a bit tricky. Have you heard of the Fibonacci sequence? It creates a cool spiral pattern seen in nature. The rule: add the previous two numbers to find the next one. The nth term? Well, that's for advanced maths - no need to worry about that just yet!

Are Quizzes the Key to Children's Success? Find Out

1.
What is the nth term of the sequence 6, 11, 16, 21?
5n
5n + 1
5n + 5
n + 5
(5 x n) + 1
2.
What is the next number in this sequence: 1, 8, 27?
35
36
54
64
These are known as cube numbers. The 1st number in the sequence is 1 x 1 x 1; the 2nd number is 2 x 2 x 2; the 3rd number is 3 x 3 x 3 and the 4th number will be 4 x 4 x 4
3.
The nth term of a sequence is given by 14n - 6. What is the numeric value of the 2nd term?
8
20
22
24
(14 x 2) - 6
4.
The nth term of a sequence is (n + 1)2. What is the the numeric value of the 4th term?
20
25
30
35
(4 + 1)2
5.
The nth term of a sequence is given by 3n + 1. What is the numeric value of the 8th term?
12
13
25
50
We are told that we need the 8th term. We put an 8 where the n is and then work it out: (3 x 8) + 1
6.
What is the next number in this sequence: 1, 1, 2, 3, 5, 8?
12
13
14
15
This is known as the Fibonacci sequence. To find each number you add together the two previous numbers. After 13 comes 21 (8 + 13) and then comes 34 (21 + 13)
7.
The nth term of a sequence is given by 3n + 1. What is the numeric value of the 3rd term?
4
6
8
10
The answer can be found as follows: (3 x 3) + 1
8.
The nth term of a sequence is (2n)2 + 1. What is the the numeric value of the 3rd term?
33
35
37
39
(2 x 3)2 + 1
9.
What is the next number in this sequence: 1, 4, 9, 16?
18
20
22
25
These are known as square numbers. The 1st number in the sequence is 1 x 1; the 2nd number is 2 x 2; the 3rd number is 3 x 3 etc.
10.
The nth term of a sequence is given by 3n + 1. What is the numeric value of the 1st term?
3
4
6
9
In the 1st term the value of n will be 1 and therefore the answer can be found as follows: (3 x 1) + 1
You can find more about this topic by visiting BBC Bitesize - Algebraic terms and expressions

Author:  Frank Evans

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