Happy Couple Numbers? #Shorts #YouTubeShorts | Don't Memorise

"Do you remember his phone number? I don't suspect so."

Determination OF Period, Block, Group (When Atomic Number is Given) || Exceptional Electronic Configuration OF Periodic Table (Short Trick to Memorise) || Typical Elements || Representative Elements || Diagonal Relationship || Bridge Element || Transition Elements

In the Awadh school Gomti Nagar,there are 500 students.60% of the students are boys,40% of whom play hockey and the girls don't play of whom play of girls play the girls don't badminton.There are only two games to be played.The number of students who don't play any game is:

What are cones? What problem occurs if they don't work properly?