The ______ of a number is a number when multiplication two times gives that number.
4 when subtracted from a positive number gives a value equal to 21 times the reciprocal of the number. The number is:
Fill in the blanks:-
i)Number of factors of a given number is ___.
ii)Every multiple of a number is ___ that number.
iii)Number of multiples of a given number is ___.
iv)Every number is a multiple of ___.