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Back to Number Patterns and Sequences — Problem 3 · Task Set 16

Exercises: Number Patterns and Sequences

Work through each section in order. Show your work where indicated. For arithmetic sequences, use the nth-term formula a+(n−1)da + (n-1)d.

Grade 7·18 problems·~30 min·Uganda NCDC Primary 7 Mathematics·lesson·patterns-03
Work through problems with immediate feedback
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Fluency Practice

Four triangular dot patterns with 1, 3, 6, and 10 dots, showing the triangular number sequence.
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The dot patterns below show the triangular numbers 1,3,6,10,…1, 3, 6, 10, \ldots. What is the next triangular number after 1010?