360 72 18 6 ? 3

Options

A. 3
B. 5
C. 4
D. 4.5

Answer

To solve the series: 360, 72, 18, 6, ?, 3, we will look for a pattern in the numbers.

1. **Identify the pattern:**
- Start with the first number: 360.
- The second number is 72. To find how we got from 360 to 72, we can divide 360 by 5:
\[ 360 \div 5 = 72 \]

2. **Continue the pattern:**
- Next, we move from 72 to 18. We can divide 72 by 4:
\[ 72 \div 4 = 18 \]

3. **Next step in the series:**
- Now, we go from 18 to 6. We can divide 18 by 3:
\[ 18 \div 3 = 6 \]

4. **Finding the missing number:**
- Following the established pattern, we now need to find the next number after 6. We divide 6 by 2:
\[ 6 \div 2 = 3 \]

5. **Final step:**
- The last number in the series is 3, which we obtained by dividing 6 by 2.

Thus, the missing number (the question mark) in the series is **3**.

### Summary of Steps:
1. Divide 360 by 5 to get 72.
2. Divide 72 by 4 to get 18.
3. Divide 18 by 3 to get 6.
4. Divide 6 by 2 to get 3.