IGCSE Number Sequence A

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

5, 9, 13, 17...

• 4n+1

• 4n-1

• n+4

• n-4

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

7, 16, 25, 24...

• 9n-2

• 9n+2

• 9n-3

• 9n+3

What is the 12th term in the sequence...

3n + 7

• 43

• 36

• 41

• 33

What is the 20th term in the sequence...

9n - 4

• 176

• 184

• 108

• 180

What is the nth term of ...

10, 7, 4, 1, ...

• 13-3n

• -3n+10

• 3n+12

• 3n-10

What is the nth term rule for the sequence 20, 18, 16, 14?

• 22 - 2n

• 20 - 2n

• 2n + 18

Find the n^th term for the following quadratic sequence...

7, 13, 23, 37, 55...

• 2n² + 5

• 2n² + 5n

• n² + 5

• n² - 5

Find the n^th term for the following quadratic sequence...

1, 13, 33, 61, 97...

• 4n² - 3

• 3n² + 3

• 3n² - 3

• 4n² + 3

The nth term of a different number sequence is

n² + 5

    

Write down the first 3 terms of this sequence.

What is a₅ in the sequence defined as follows?

a_n = 5 ⋅ 2^(n-1)

• a₅ = 160

• a₅ = 40

• a₅ = 10

• a₅ = 80