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Australia
Year 6

1.04 Square and triangular numbers

Interactive practice questions

Write down the next $3$3 triangular numbers.

$1$1, $3$3, $6$6, $10$10, $15$15, $\editable{}$, $\editable{}$, $\editable{}$

Easy
< 1min

Beginning with the eighth triangular number, write down the next $3$3 triangular numbers is this series.

Easy
< 1min

Find the $6$6th triangular number.

Medium
1min

Find the $9$9th triangular number.

Medium
< 1min
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Outcomes

ACMNA122

Identify and describe properties of prime, composite, square and triangular numbers

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