# 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.

# Ex 5: Volume of a Solid with Known Cross Section Using Integration – Pyramid

This video explains how to use integration with respect to y to find the volume of a solid using slices or with a known cross section.  This video find the volume of a pyramid.

# Ex 4: Volume of a Solid with Known Cross Section Using Integration – Volume by Slices

This video explains how to use integration to find the volume of a solid using slices or with a known cross section. The cross section is a square.

# Ex 3: Volume of a Solid with Known Cross Section Using Integration – Volume by Slices

This video explains how to use integration to find the volume of a solid using slices or with a known cross section. The cross section is a circle.

# Ex 2: Volume of a Solid with Known Cross Section Using Integration – Volume by Slices

This video explains how to use integration to find the volume of a solid using slices or with a known cross section. The cross section is a triangle.