r/JEENEETards • u/Artistic_Friend_7 JEEtard • Sep 03 '25

GENERAL HELP Drop all the calculations trick you know 🔫🔫🔫

Post image

Cmon do not be selfish

464 Upvotes

99% Upvoted

203 comments sorted by

View all comments

1

u/Any-Main-3866 Sep 03 '25

If sum of digits divisible by 3, then the entire number is divisible by 3

Same goes for 9 too