Number sequences and patternsIB MYP Maths Extended: Mind map

Exam questions on Number sequences and patterns

1. A sequence begins $7,\ 11,\ 15,\ 19,\ \ldots$ and continues in the same way.
   Show that $150$ is not a term in the sequence.2 marks
2. The first five triangular numbers are $1,\ 3,\ 6,\ 10,\ 15$.
   Find the $10$th triangular number.2 marks
3. The first three terms of a sequence are $20,\ 17,\ 14$, and the sequence continues with the same common difference.
   Find an expression for the $n$th term of the sequence.3 marks