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H.C.F and L.C.M

HomeQuantitative Aptitude⇒ 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


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