text: Let the child be 'x' years old right now.\nSo the mum must be x + 21 years of age.\nSo, After 6 years the mum will be x + 21 + 6 = x + 27\nyears old and the child will be (x + 6) years old\nat that time.\nSo from the given information we get,\n5*(x+6)=x+27\nTherefore,\n5*x+30=x+27\nTherefore,\n4*x=27-30\nTherefore\n4*x=-3\nTherefore\nx=-3/4\nBut -3/4 years = -3/4 * 12 months\ni.e. the child is -9 months right now.\nThis means the child is just getting conceived.\nHence the father of the child must be in bed with\nthe mum right now!