The factors of 72 are __________________.
5, 7, 10, 11, 13, 17, 21 and 23
1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72
5, 7, 13, 14, 15, 16, 17 and 19
5, 7, 11, 13, 15, 16, 17, 20, and 25
72=1×72
=2×36
=3×24
=4×18
=6×12
=8×9
Factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72.
Prove that:(i) 13+√7+1√7+√5+1√5+√3+1√3+1=1(ii) 11+√2+1√2+√3+1√3+√4+1√4+√5+1√5+√6+1√6+√7+1√7+√8+1√8+√9=2
The marks obtained by 40 students of a class in an examination are given below. 3, 20, 13, 1, 21, 13, 3, 23, 16, 13, 18, 12, 5, 12, 5, 24, 9, 2, 7, 18, 20,3,10, 12, 7, 18, 2, 5, 7, 10, 16, 8, 16, 17, 8, 23, 24, 6, 23, 15. Present the data in the form of a frequency distribution using equal class size, one such class being 10-15 (15 not included).