Some people say this is "how the Japanese multiply." Others say this is "Vedic Math." I'm not sure of the origin, but this is a visual way to multiply two numbers and it does work. The video also shows how to use the same method to...

In this video, you will learn about the concept of factorials in mathematics and how to calculate them using JavaScript. A factorial is a mathematical function that represents the product of all positive integers from 1 up to a given...

The answer lies in the weirdness of floating-point numbers and the computer's perception of a number line.

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

In this video, a teacher explains how to solve a probability problem involving rolling two dice and finding the probability of getting a product of 2. The teacher walks through the steps of understanding the question, listing possible...

In this video, the teacher explains how to calculate the probability of selecting a green marble from a bag of marbles that is 1/3 blue and the rest green. The teacher demonstrates how to represent fractions, decimals, and percentages on...

Pupil outcome: I can use my knowledge of conditional probability to solve problems. Key learning points: - Probabilities may appear in unfamiliar contexts - Probabilities may require a strong knowledge of converting between fractions,...

In the previous tutorial we introduced our second quantum problem, that of the quantum barrier potential. Again, this involves a free particle that encounters a barrier of finite potential. We've already solved the Schrödinger equation...

The Harvard admissions exam in 1869 included this algebra problem: "A man bought a watch, a chain, and a locket for $216. The watch and locket together cost three times as much as the chain, and the chain and locket together cost half as...

Problem 1: Two ladders are criss-crossed against walls of height 3 and 5. At what height do they intersect? Problem 2: I take 3 hours to complete a job, and you take 5 hours to do the same job. How long does it take if we work together?...

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

Thanks to Halvor Kjærås for creating this logic puzzle! Barney says he caught 5 fish, and Alfred says he caught 2. But each person fibs about numbers when spoken aloud. Can you figure out how many each person actually caught? My blog...

A child spent $100.00 to get 100 toy animals. The child bought at least one cat, one fish, and one bird, and did not buy any other toys. If a cat costs $10.00, a fish costs $3.00, and a bird costs $0.50, how many of each toy did the...

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

This problem is making the rounds. Can you place numbers in the four boxes so all the equations are true? Blog post (text/image explanation) If you like my videos, you...

This emoji math puzzle is going viral and being shared with claims like "only a genius can solve it" or "99 percent fail." In this video I present what many people believe to be the correct answer. My blog post for this