Sequences Formulas

The fifth term of a sequence is 23. The term-to-term rule is 'add 4'. Work out the first term of the sequence.

• 7

• 14

Write down the first three terms of each sequence.

First term: -10

(term-to-term rule: 'add 20')

• -10, -30, -40

• -10, 10, 30

25, 26, 27, 28, ..., ...

Work out the position-to-term for the sequence of numbers.

• Position number + 24

• Position number + 23

• 1, 4, 7; 28

• 6, 8, 10; 24

• 1, 3, 5; 17

• 5, 7, 9; 18

Find the n^th term of the following sequence...

5, 9, 13, 17...

• 4n + 1

• n + 4

• 4n -1

• n - 4

Find the n^th term of the following sequence...

8, 13, 18, 23...

• 5n + 3

• n + 5

• 3n + 5

• n + 3

Find the n^th term of the following sequence...

2, 5, 8, 11...

• 3n - 1

• n + 3

• 3n + 1

• n - 1