Divisibility test for 3 and 9

In this video, we explore how we can determine if a number is divisible by 3 and 9. Finally, we arrive at a simple test which tells us the same.

#math #education #learning #divisibility #school #teaching #numbers #remainders

[confusedjpg]

thank you for the amazing explanations!

[smrutiranjan]

This is the difference between, remembering a formula vs understanding a formula.

[ayeshajulekha]

Well explained, I shared with my students 😊

[prathamsrivastava]

please make a big video for divisibility test of 2, 5, 3, 9, 11, ... 2^n, 5^n, 10^n, ... 6, 15, ...
And the "Remainder method".
And also you can do divisibility test of 7 and 13 using the remainder method.

[nikhiljayansingla]

Can you please do arithmetic identities next.

(a + b)2 = a2 + b2 + 2ab.

(a – b)2 = a2 + b2 – 2ab.

a2 – b2= (a + b)(a – b)