# Olga Hotz

Olga Holtz is Russian mathematician born in 1973 specializing whose parents where both programmers and performs with the Berlin Philharmonic Choir, …

Olga Holtz is Russian mathematician born in 1973 specializing whose parents where both programmers and performs with the Berlin Philharmonic Choir, …

How many times do you get a question from a student like this? What could I possibly use this math …

Introduction The theme of one of our priest’s homily was the need to pause, collect your thoughts, silence your attention …

Overview of process Below are pictures showing how to create a large ellipse (half of one but can also be used …

This math trick is called Hummer’s Poker Chip Trick. The trick uses six poker chips with a number on both …

In 1927 Royal V. Heath marketed a magic effect called “The Di-Ciphering Trick” based on a math trick developed by …

Mark Frauenfelder of Boing Boing demonstrates a foolproof spelling-based card trick that will surely impress children (and adults too!). The …

The Trick I have used this number trick many times with beginning Algebra classes. I take a dictionary to class …

Question from a reader: I’m currently studying and writing down problems and math just to pass a test at a …

A question came up on Quora site. Can you create a decision tree diagram to find all 3 digits numbers …

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