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Which rule gives the pattern 6, 11, 16, 21, …? (n is the position.)

Class 7Formulas and Rules from PatternsAlgebra

A $5 n + 6$
Bn + 5
C $5 n + 1$
D $6 n$

Step-by-Step Solution

The terms go up by 5, so the rule starts

5 n

. For

n = 1, 5 n = 5

but the term is 6, so add 1:

5 n + 1

. Check

n = 4

: 21 ✓.

Answer: C)

5 n + 1

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