What's the Unit Digit? Most Students Get It Wrong!

🤔 What's the Unit Digit? Most Students Get It Wrong!

Can you find the unit digit of:

1! + 2! + 3! + 4! + 5! + ... + 1399!

At first glance, the answer looks obvious... but there's a small trick that changes everything! 😱

🧠 Try solving it yourself before watching the full solution.
👇 Comment your answer before the reveal!

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Видео What's the Unit Digit? Most Students Get It Wrong! канала Tapasya Academy