# Curious Calculation: The Secret of 73

This video provides a curious calculation that always results in 73. The reason the calculation always results in 73 is explained.

# Bar Code Calculation to Determine The Check Digit

This video explains how to perform arithmetic using the digits of the bar code to determine the right most digit or check digit.

# Curious Calculation: 3 Digit Num Divided by Sum of Digits (Proof Included)

This video show a calculation starting with a 3 digit number with all the same digit divided by the sum of the digits is always the same result.

# Curious Calculation: Result is Always 8 (Proof Included)

This video show a calculation starting with any counting number that always results in 8. A proof is included.

# Curious Calculation: Result is Always 3 (Proof Included)

This video show a calculation starting with any counting number that always results in 3. A proof is included.

# Curious Math Fact: 10! Seconds = 6 Weeks

This video verifies that 10 factorial seconds equals 6 weeks of time.

# Fun Multiplication Pattern

This video shows an interesting pattern when multiplying 1×1, 11×11, 111×111, etc.