10. TieH.C.F. of two numbers is 3 . Which of the following pairs represents the two numbers in the options below? A. 12 and 17 B. $$ \quad 10 $$ and 20 C. 9 and 15 D. 8 and 12 E. 4 and 6 15. 11. $$ 25 \% $$ of 500.00 is less than one of the following by $$ \$ 80.00 $$. A. $$ \$ 195.00 $$ B. $$ \quad 2205.00 $$ C. $$ \quad \$ 225.00 $$ D. $$ \quad $$ 230.00 E. $$ \quad \$ 240.00 $$ 12. Change $$ \$ 32.08 $$ to kobo. A. $$ \quad 320 $$ B. 328 C. $$ \quad 330 $$ D. 3,208 E. 3,280 13. How many NIO.00 added up to make $$ 211,000.00 ? $$

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### Problem 10: Finding pairs of numbers with H.C.F. of 3

**Known Condition:** The H.C.F. of two numbers is 3.

**Options:**
- A. 12 and 17
- B. 10 and 20
- C. 9 and 15
- D. 8 and 12
- E. 4 and 6

**Step 1:** Check each pair to see if their H.C.F. is 3.

1. **Pair A: 12 and 17**
   - Factors of 12: 1, 2, 3, 4, 6, 12
   - Factors of 17: 1, 17
   - H.C.F. = 1 (not 3)

2. **Pair B: 10 and 20**
   - Factors of 10: 1, 2, 5, 10
   - Factors of 20: 1, 2, 4, 5, 10, 20
   - H.C.F. = 10 (not 3)

3. **Pair C: 9 and 15**
   - Factors of 9: 1, 3, 9
   - Factors of 15: 1, 3, 5, 15
   - H.C.F. = 3 (this is a valid pair)

4. **Pair D: 8 and 12**
   - Factors of 8: 1, 2, 4, 8
   - Factors of 12: 1, 2, 3, 4, 6, 12
   - H.C.F. = 4 (not 3)

5. **Pair E: 4 and 6**
   - Factors of 4: 1, 2, 4
   - Factors of 6: 1, 2, 3, 6
   - H.C.F. = 2 (not 3)

**Conclusion for Problem 10:** The pair that represents the two numbers with H.C.F. of 3 is **C. 9 and 15**.

---

### Problem 11: Finding a value that is $80 more than 25% of 500

**Step 1:** Calculate $$ 25\% $$ of 500.
$$
\text{Value} = 0.25 \times 500
$$

**Step 2:** Find the value that is $80 more than this result.

**Calculating:**
$$
\text{Value} = 0.25 \times 500 = 125
$$
$$
\text{Value} + 80 = 125 + 80 = 205
$$

**Step 3:** Check which option is greater than 205.

- A. 195 (not greater)
- B. 2205 (greater)
- C. 225 (greater)
- D. 230 (greater)
- E. 240 (greater)

**Conclusion for Problem 11:** The answer is **B. 2205**.

---

### Problem 12: Converting $32.08 to kobo

**Known Condition:** 1 dollar = 100 kobo.

**Step 1:** Convert $32.08 to kobo.
$$
\text{Kobo} = 32.08 \times 100
$$

**Calculating:**
$$
\text{Kobo} = 3208
$$

**Conclusion for Problem 12:** The answer is **D. 3,208**.

---

### Problem 13: Finding how many NIO.00 make 211,000.00

**Known Condition:** We need to find how many NIO.00 make up 211,000.00.

**Step 1:** Since NIO.00 is the same as 1, we can directly calculate:
$$
\text{Number of NIO.00} = 211,000.00 / 1
$$

**Calculating:**
$$
\text{Number of NIO.00} = 211,000
$$

**Conclusion for Problem 13:** The answer is **211,000**.

---

### Summary of Answers:
- Problem 10: C. 9 and 15
- Problem 11: B. 2205
- Problem 12: D. 3,208
- Problem 13: 211,000
- Problem 10: C. 9 and 15 - Problem 11: B. 2205 - Problem 12: D. 3,208 - Problem 13: 211,000

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