header

H.C.F and L.C.M

Q41. The H.C.F and L.C.M of two numbers a and b are respectively 3 and 105. If a - b = 30, then (1/a) - (1/b) = ?
(a) -2/21
(b) -3/17
(c) -2/13
(d) -3/23


1 2 3 4 5