546: A cube of side 2 units is placed in a rectangular coordinate system with its centre at the origin. The coordinates of a set of 4 non-adjacent corners is
(a) (1, 1, 1); (-1, -1, -1); (1, -1, -1);
(b) (1, 1, 1); (-1, 1, 1); (1, -1, 1); (1, 1, -1)
(c) (1, 1, 1); (-1, -1, -1); (-1, 1, 1); (1, -1,-1)
(d) (-1, -1, -1); (1, 1, -1);. (-1, 1, 1); (-1, 1, -1)
548: Federation, Indian responsibility, reservation and safeguards were the three lynchpins of
(a) Gandhi-lrwin Pact
(b) Macdonald Award
(c) Poona Pact
(d) Radcliffe Award
550: In a family, a couple has a son and a daughter. The age of the father is three times that of his daughter and the age of the son is half of his mother. The wife is nine years younger to her husband and the brother is seven years older than his sister. What is the age of the mother ?
(a) 40 years
(b) 45 years
(c) 50 years
(d) 60 years