Number sequences (a) 6, 12, 18, 24, , . The sixth number is . What is the answer? (b) 2, 4, 8, 16, 32, 64. The sixth number is 64. What is the answer?

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For part (a):
The sequence is $6, 12, 18, 24, \dots$. This is an arithmetic sequence with a common difference of 6.
The fifth term is $24 + 6 = 30$.
The sixth term is $30 + 6 = 36$.
Your answer, "the sixth number is 36", is ✅ Correct.

For part (b):
The sequence is $2, 4, 8, 16, \dots$. This is a geometric sequence with a common ratio of 2.
The fifth term is $16 \times 2 = 32$.
The sixth term is $32 \times 2 = 64$.
Your answer, "the sixth number is 64", is ✅ Correct.