Want to impress your friends with a quick math trick? Here’s a fun tip to check if a number is divisible by 11—no calculator needed!

1. Take any number, like 1,364.
2. Separate the digits and alternate between adding and subtracting them from left to right.
   For example, 1 - 3 + 6 - 4 = 0.
3. If the result is 0 or a multiple of 11, the original number is divisible by 11!

Give it a try with other numbers! Does 7,438 work? How about 3,828? Post your answers in the comments! #MathTricks #DivisibilityRules #NumberFun