Which of the following numbers are divisible by 3?
165,651

Answer

To determine if the numbers 165 and 651 are divisible by 3, we will use the divisibility rule for 3. According to this rule, a number is divisible by 3 if the sum of its digits is divisible by 3.

### Step-by-Step Solution:

**Step 1: Check the number 165.**
- Find the sum of the digits of 165.
- The digits are: 1, 6, and 5.
- Sum = 1 + 6 + 5 = 12.

**Step 2: Check if the sum (12) is divisible by 3.**
- Divide 12 by 3.
- 12 ÷ 3 = 4, which is a whole number.
- Since 12 is divisible by 3, we conclude that 165 is also divisible by 3.

**Step 3: Check the number 651.**
- Find the sum of the digits of 651.
- The digits are: 6, 5, and 1.
- Sum = 6 + 5 + 1 = 12.

**Step 4: Check if the sum (12) is divisible by 3.**
- Divide 12 by 3.
- 12 ÷ 3 = 4, which is a whole number.
- Since 12 is divisible by 3, we conclude that 651 is also divisible by 3.

### Conclusion:
Both numbers, 165 and 651, are divisible by 3.

---