Growth patterns and figurate numbers

Some patterns grow by an increasing amount: a triangle of dots gains a longer row each time, a square gains an L-shaped border. Recognising the shape of the growth lets you jump to a distant term instead of drawing every stage.

Your progress

Not started

6Not started
0Familiar
0Proficient
0Mastered

Saved in this browser only. No account, nothing sent anywhere.

Work through it

LearnWhat it is, how to spot it, a worked example, and where it goes wrong.
Practice — 3-point ladderNo problems written at this tier yet.Nothing written at this tier yet
Practice — 4-point ladder5 problems. Three in a row finishes it.0/3 in a row · 0/5 solved
Practice — 5-point ladder1 problem. Three in a row finishes it.0/3 in a row · 0/1 solved
Skill quizFinish every ladder that has problems first.Finish the ladders above first

Before and after

Needs first

PAT-02Arithmetic sequences and the nth term

Opens up

Nothing yet. No other skill in the Atlas lists this one as a prerequisite.

In official papers

No indexed official paper question has been tagged with PAT-04 yet. The index grows one paper at a time, and it records only question numbers, point values and our own skill tags — never the problems themselves.

See the papers indexed so far

Loading…