Hide last three digit 🔐 #exceltutorial #intelkeenskills

Learn how to hide the last 3 digits of a phone number or any text using a smart Excel formula:
=LEFT(A1, LEN(A1)-3) & "XXX"

In this tutorial, you’ll understand:
What the LEFT function does in Excel
How the LEN function works to count characters
Step-by-step breakdown of a formula to mask sensitive data like phone numbers

Real-world example: 9876543210 → 9876543XXX

Perfect for beginners who want to clean data, format numbers, or keep some information private in Excel.

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