JEE Mains 2022: Probability & PNC Question | A Clever Trick for Divisibility by 21 | JEE 2025

[@Deevige]

❤❤❤❤❤❤❤🎉🎉
Great solution

[@factorialacademy]

❤️❤️

[@RaSiddharth]

respected sir kindly keep bringing these tricky questions so that we used to related concepts 😊 . thankyou sir for helping us feeling confident in maths now

[@factorialacademy]

Thankyou!

[@SANKALP4546]

Thank u sir i was struggling with this question due toh divisibility of 7 ur solved my problem thank u soo much 😅❤

[@factorialacademy]

You're welcome! Glad I could help.

[@VisheshMishra2007-c1t]

🎉

[@keshavvaid2525]

Pls upload 4 to 5 video daily as jee is aproaching near

[@factorialacademy]

Yes trying to increase frequency

[@rahulsachdeva4046]

Nice explanation👌🏻

[@factorialacademy]

Thank you!

[@aarushisingh07]

Thankyou sir

[@factorialacademy]

Welcome!

[@The_Obliterator]

Graphs of rational functions pelase

[@factorialacademy]

Okay! Soon

[@AlokRaj-c1f]

Sir probability ka 2023 ka pura question discuss kijiye please

[@factorialacademy]

Okay will put soon

[@VegaAltair-wj5tr]

See , every 10^a type term is 1 mod 7 so everynumber will become 1111111 which is divisible by 7

[@rahulsachdeva4046]

Thats exactly what he explained in the question!

[@VegaAltair-wj5tr]

@rahulsachdeva4046 Yes

[@factorialacademy]

Yes 👍

[@doge_the_cat]

Nah bro how? 10 = 3 mod 7
10^a = 3^a mod 7

[@VegaAltair-wj5tr]

@@doge_the_cat I meant X * 10^a where X is 1,8 is 10^a mod 7

[@ManishSharma-xe2mw]

Thank you sir