Natural numbers: interactive worksheets and online exercises ... - Free Printable

To solve the problem, we need to identify the pattern in each sequence and determine the missing numbers. Let's analyze each sequence step by step.

---

Sequence 1:

Pattern:
2, 4, 6, 8, 10, __, __

- The sequence is increasing by 2 each time.
- Next number: \( 10 + 2 = 12 \)
- Next number: \( 12 + 2 = 14 \)

Missing numbers: 12, 14

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Sequence 2:

Pattern:
17, 19, 21, 23, 25, __, __

- The sequence is increasing by 2 each time.
- Next number: \( 25 + 2 = 27 \)
- Next number: \( 27 + 2 = 29 \)

Missing numbers: 27, 29

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Sequence 3:

Pattern:
48, 44, 40, 36, 32, __, __

- The sequence is decreasing by 4 each time.
- Next number: \( 32 - 4 = 28 \)
- Next number: \( 28 - 4 = 24 \)

Missing numbers: 28, 24

---

Sequence 4:

Pattern:
10, 15, 20, 25, 30, __, __

- The sequence is increasing by 5 each time.
- Next number: \( 30 + 5 = 35 \)
- Next number: \( 35 + 5 = 40 \)

Missing numbers: 35, 40

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Sequence 5:

Pattern:
27, 25, 23, 21, 19, __, __

- The sequence is decreasing by 2 each time.
- Next number: \( 19 - 2 = 17 \)
- Next number: \( 17 - 2 = 15 \)

Missing numbers: 17, 15

---

Sequence 6:

Pattern:
6, 12, 18, 24, 30, __, __

- The sequence is increasing by 6 each time.
- Next number: \( 30 + 6 = 36 \)
- Next number: \( 36 + 6 = 42 \)

Missing numbers: 36, 42

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Sequence 7:

Pattern:
1, 3, 5, 7, 9, __, __

- The sequence is increasing by 2 each time.
- Next number: \( 9 + 2 = 11 \)
- Next number: \( 11 + 2 = 13 \)

Missing numbers: 11, 13

---

Sequence 8:

Pattern:
40, 38, 36, 34, 32, __, __

- The sequence is decreasing by 2 each time.
- Next number: \( 32 - 2 = 30 \)
- Next number: \( 30 - 2 = 28 \)

Missing numbers: 30, 28

---

Sequence 9:

Pattern:
12, 15, 18, 21, 24, __, __

- The sequence is increasing by 3 each time.
- Next number: \( 24 + 3 = 27 \)
- Next number: \( 27 + 3 = 30 \)

Missing numbers: 27, 30

---

Final Answer:

\[
\boxed{
\begin{array}{ll}
\text{Q1:} & 12, 14 \\
\text{Q2:} & 27, 29 \\
\text{Q3:} & 28, 24 \\
\text{Q4:} & 35, 40 \\
\text{Q5:} & 17, 15 \\
\text{Q6:} & 36, 42 \\
\text{Q7:} & 11, 13 \\
\text{Q8:} & 30, 28 \\
\text{Q9:} & 27, 30 \\
\end{array}
}
\]