[cheerful upbeat music] ♪ - THANK GOODNESS FOR TODAY'S MATH LESSON. MATH IS SO IMPORTANT, BECAUSE WITHOUT IT, I WOULDN'T KNOW HOW MANY DAYS THERE ARE UNTIL MY BIRTHDAY. THERE ARE... 182 DAYS UNTIL MY ...

NCERT Mathematics Textbook: The "?" mark is used in the textbook to indicate students to start thinking NCERT New Class 8 Mathematics Textbook Ganita Prakash: The National Council of Educational ...