NZ Level 4
Rules for describing sequences

## Interactive practice questions

Use the rule to complete the table of values:

"The starting number is doubled, then $4$4 is subtracted."

a
 Starting Number ($N$N) $12$12 $13$13 $14$14 $15$15 Answer ($A$A) $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$
b

Which of these equations describes the rule above?

$A=2\times\left(N-4\right)$A=2×(N4)

A

$A=N\times2-4$A=N×24

B

$A=N^2-4$A=N24

C

$A=2+N-4$A=2+N4

D

$A=2\times\left(N-4\right)$A=2×(N4)

A

$A=N\times2-4$A=N×24

B

$A=N^2-4$A=N24

C

$A=2+N-4$A=2+N4

D
Easy
Approx 2 minutes

Use the rule to complete the table of values:

"The starting number has $9$9 added to it. The sum is then multiplied by $5$5."

Given the following pattern used in constructing matchstick figures:

Matches were used to make the pattern below:

### Outcomes

#### NA4-7

Form and solve simple linear equations