866: When iron rusts, the weight:
(a) Increases
(b) Decreases
(c) Remains the same
(d) First increases then decreases
867: A boy carved his initials on the-bark of a tree at a height of 2.5 m above the ground when the tree was 5 m tall. In 10 years the tree attained a height of 15 m. The initials carved by the boy 10 years ago will now be found:
(a) At 2.5 m above the ground
(b) At 7.5 m above the ground
(c) At 12.5 m above the ground
(d) At 15.0 m above the ground
868: A cube with all the sides painted was divided into small cubes of equal measurement. The side of a small cube is exactly one fourth as that of the big cube. Therefore, the number of small cubes with only one side painted is:
(a) 64
(b) 36
(c) 24
(d) 12
869: The misery index is the sum of a country's unemployment and inflation rate. The higher the index, the more miserable is the country to live in. The figure given below is the Misery Index for various countries in Europe :
Which of the following conclusions can be drawn from the misery index given above ?
I. Britain is the most miserable country to live in.
II. The inflation rate in Spain is less than that in Belgium and Britain.
III. Italy and France seem to have almost identical unemployment rate.
IV. The higher the misery index, the higher the inflation rate.
Select the correct answer using the codes given below:
Codes:
(a) I alone
(b) II and III
(c) I, II, III and IV
(d) None of the above
870: Which of the following was the main reason of the downfall of Mauryan empire ?
(a) Weak successors of Ashoka who could not control the empire properly
(b) Religious policy of Ashoka
(c) Ashoka maintained friendly relations with his neighbours
(d) None of the above