Trigonometry ex 8.1 | important questions of boards | chapter 8 maths

Most important question class 10 chapter 4 Quadratic equation

Biology most important questions, neet Biology important questioneet biology,neet biology questions,neet important questions,neet biology most important questions,neet questions,most expected questions for neet 2021 biology,biology most important questions 2020,neet biology questions with solutions,neet biology questions in hindi,neet biology mcq,neet 2020,neet important questions 2021,most expected questions of biology for neet 2020,most expected questions for neet 2021,neet biology mcq chapter wisens

class 10 exercise 8.4 question 4 part 1and2

There are 3 parts A,B and C in a question paper of Math's, which includes 6,7 and 8 questions respectivelty. From these parts 3,4 and 5 questions respectively are to be solved. In how many ways can a student select the questions from these parts?

Consider a chessboard of size 8 units xx8 units (i.e., each small square on the board has a side length of 1 unit). Let S be the set of all the 81 vertices of all the squares on the board. What is number of line segments whose vertices are in S_(1) and whose length is a positive integer? (The segments need not be parallel to the sides of the board).