Cuemath on Instagram: "Hidden Math in Credit Card Numbers 💳 The last digit of a credit card number can actually be calculated using the rest of the digits. In this video, we uncover the hidden math behind credit card numbers. ✨ Try it out and let us know in the comments if the math check works for your card! 💬 (Please don’t share your actual credit card numbers — just check and tell us if the math works!) ⚠️ To learn math through interesting real-world examples 🌎, try our 1:1 personalised onl