Mathematics MCQs

Page No. 7

If the volumes of two cubes are in the ratio 8: 1, the ratio of their edges is_________?


a8: 1


b2√2 : 1


c2 : 1


dNone of these


View Answer 2 : 1

The radius of a wire is decreased to one –third if volume remains the same length will increase


a1 Time


b3 times


c6 times


d9 times


View Answer 9 times

The length of the wire of 0.2mm radius that can be drawn after melting a solid copper sphere of diameter 18cm?


a24.3 m


b243 m


c2430 m


d24300 m


View Answer 24300 m

The number of solid spheres each of diameter 6 cm, that could be moulded to form a solid metal cylinder of height 45 cm and diameter 4 cm is?


a3


b4


c5


d6


View Answer 5

The radius of a circular cylinder is the same as that of a sphere. Their volumes are equal. The height of the cylinder is________?


a4/3 times its radius


b2/3 times its radius


cEqual to it’s radius


dEqual to it’s diameter


View Answer 4/3 times its radius

A right cylinder and a right circular cone have the same radius and the same volume. The ratio of the height of the cylinder to that of the cone is_________?


a3: 5


b2: 5


c3: 1


d1: 3


View Answer 1: 3

If the volume and surface area of a sphere is numerically the same then it’s radius is_________?


a1 unit


b2 units


c3 units


d4 units


View Answer 3 units

A gardener was asked a plant flowers in a row containing equal number of plants. He tried to plant 6, 8, 10 and 12 in each row, but 5 plants left in each case. When he planted 13 in a row, no plant was left. Find the number of plants with him?


a245


b125


c485


d845


View Answer 845

Find the smallest number which when increased by 5, divisible by 6, 9, 15, 20 and 24?


a344


b355


c366


d377


View Answer 355

Find the greatest 4-digit number exactly divisible by 3, 4 and 5?


a9985


b9960


c9957


d9975


View Answer 9960

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