Maths · Sequences
Find the rule and reach term 100 without counting one by one
Choose a level
Type the next number, draw dot figure 4 and sort sequences
Nothing is picked here: the next number, term 100 or the sum are typed in. In an arithmetic sequence the same amount is always added; in a geometric one it is multiplied.
In the dot figures you draw figure 4 by tapping squares. And the general term is built with − and +: dn + c for arithmetic, a × rⁿ⁻¹ for geometric, checking whether your formula gives the same terms.
⏱️ 90s · Correct +10 and +6s · Wrong −5s
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