Write five numbers for which you cannot decide whether they are squares just by looking at unit digit.

Explanation

To solve the problem of identifying five numbers for which we cannot determine if they are perfect squares just by looking at their unit digits, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Perfect Squares**:
We know that perfect squares have specific unit digits. The unit digits of perfect squares can only be 0, 1, 4, 5, 6, or 9. Therefore, if a number ends with the digits 2, 3, 7, or 8, we can immediately conclude that it is not a perfect square.

2. **Identifying Ambiguous Unit Digits**:
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