Cool math mental multiplication trick - become a genius solving math instantly! | Summary and Q&A

TL;DR

Learn a simple math trick for quickly multiplying two-digit numbers.

Key Insights

• 🍹 The math trick for multiplication requires finding two numbers with the same first digit and a sum of 10.
• 👻 The trick allows for quickly calculating the answer by multiplying the number above the first digit with the digit itself and the second digits separately.
• ✖️ The trick has limitations and is specific to multiplying certain two-digit numbers.
• 🥺 Incorporating this trick with other math tricks can lead to complex calculations.

Transcript

good day and welcome to the tech math Channel what I'm going to be having a look at in this video today is just a it's a peculiar little math trick um for multiplication it's a it's a really good little one so I'm just going to uh see if you can figure it out um I will obviously give you the uh secret with this but it's a really good one for workin... Read More

Questions & Answers

Q: How does the math trick for multiplication work?

The trick relies on finding two numbers with the same first digit and a sum of 10. By multiplying the number above the first digit with the digit itself, and the second digits separately, you can find the answer.

Q: What are the conditions required for the math trick to work?

Two conditions must be met for the trick to work: the two numbers being multiplied should have the same first digit, and their second digits should add up to 10.

Q: Can you provide an example of using the math trick?

Sure! Let's take the example of multiplying 42 and 48. The number above 4 is 5, so we multiply 5 and 4 to get 20. Then, we multiply 2 and 8 to get 16. The answer is 2016.

Q: Can this math trick be used for any numbers?

No, this trick has limitations and only works when the two numbers being multiplied meet the specified conditions. It is designed for quickly calculating multiplication of certain two-digit numbers.

Summary & Key Takeaways

• The video demonstrates a math trick for instantly multiplying numbers.

• The trick involves finding numbers that have the same first digit and add up to 10.

• By multiplying the number above the first digit with the digit itself, and the second digits separately, you can quickly find the answer.