796: Variations in the length of daytime and night time from season to season are due to
(a) the earth's rotation on its axis
(b) the earth's revolution round the sun in an elliptical manner
(c) latitudinal position of the place
(d) revolution of the earth on a tilted axis
797: On multiplying a number by 3, the product is a number each of whose digits is 7. What is the smallest such number?
798: High tides at antipodes are caused due to:
(a) Gravitational pull of the moon and the sun
(b) Gravitational pull of the sun
(c) Centrifugal, centripetal and gravitational pull of the sun
(d) Centrifugal, centripetal and gravitational pull of the sun and the moon
799: One of the major towns in the Satavahana kingdom was
(a) Arikkamedu
(b) Pratishthana
(c) Korkkai
(d) Maski
800: The Union Budget, 2000 awarded a Tax Holiday for the North-Eastern Region to promote industrialisation for
(a) 5 years
(b) 7 years
(c) 9 years
(d) 10 years