The least number to be substracted from 220 so that it become a perfect cube is

Options

A. 4
B. 10
C. 16
D. 20

Explanation

To find the least number to be subtracted from 220 so that it becomes a perfect cube, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the nearest perfect cubes**:
First, we need to find the perfect cubes around the number 220. The perfect cubes are:
- \( 1^3 = 1 \)
- \( 2^3 = 8 \)
- \( 3^3 = 27 \)
- \( 4^3 = 64 \)
- \( 5^3 = 125 \)
- \( 6^3 = 216 \)
- \( 7^3 = 343 \)

2. **Determine the nearest perfect cube less than 220**:
From the list, we see that \( 6^3 = 216 \) is the nearest perfect cube less than 220.

3. **Calculate the difference**:
Now, we need to subtract this perfect cube from 220 to find the least number to be subtracted:
\[ 220 - 216 = 4 \]

4. **Conclusion**:
Therefore, the least number that needs to be subtracted from 220 to make it a perfect cube is **4**.

### Final Answer:
The least number to be subtracted from 220 so that it becomes a perfect cube is **4**.

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