53. What is used to identify whether a data word has an odd or even number of l’s ?
54. Rearranging and allocating space in memory to provide for multiple computing tasks is called
55. What happens when a drop of glycerol is added to crushed KMnO, spread on a paper ?
56. The least penetrating power ray is
57. Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen?
58. The velocity of sound in moist air is more than in dry air because the moist air has
59. What is the use of X-rays?
60. Ice is packed in sawdust because
61. In ΔABC, a line through A cuts the side BC at D such that BD : DC = 4 :5. If the area of ΔABD = 60 cm , then the area of ΔADC is
62. A tangent is drawn to a circle of radius 6 cm from a point situated at a distance of 10 cm from the centre of the circle. The length of the tangent will be
63. A ship after sailing 12 km towards south from a particular place covered 5 km more towards east. Then the straightway distance of the ship from that place is
64. The sides of a triangle having area 7776 sq. cm are in the ratio 3 : 4 : 5. The perimeter of the triangle is
65. Two chords of length a unit and b unit of a circle make angles 60° and 90° at the centre of a circle respectively, then the correct relation is
66. In a parallelogram PQRS, angle P is four times of angle Q, then the measure of angle R is
67. The sum of four numbers is 48. When 5 and 1 are added to the first two; and 3 and 7 are subtracted from the 3rd and 4th, all the four numbers will be equal. The numbers are
68. The least number that should be added to 2055, so that the sum is exactly divisible by 27 is
69. A and B together can do a piece of work in 6 days. If A can alone do the work in 18 days, then the number of days required for B to finish the work is
70. A pipe can fill a tank in x hours and another can empty it in y hours. They can together fill it in (y > x )
71. Two poles of height 7 metre and 12 metre stand on a plane ground. If the distance between their feet is 12 metre, the distance between their top will be
72. The maximum value of sin θ + cos θ is
73. Find the value of tan 4° tan 43° tan 47 tan 86°
74. A square is inscribed in a quarter-circle in such a manner that two of its adjacent vertices lie on the two radii at an equal distance from the centre, while the other two vertices lie on the circular arc. If the square has sides of length x, then the radius of the circle is
75. 10% discount and then 20% discount in succession is equivalent to total discount of
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