Quantitative-aptitude Questions Set 166:
Aptitude
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If the roots of the equation 2x2 - 5x + b = 0 are in the ratio of 2:3, then find the value of b.
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The sequence 22, 21, 23, 22, 24, 23, ... follows a pattern. What is the next number in the sequence?
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A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
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Find the equation whose roots are thrice the reciprocal of the roots of the equation x2 + 5x + 6 = 0.
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A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are picked at random, what is the probability that they are either blue or yellow?
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If A $ B means A is the brother of B, B * C means B is the son of C, C @ D means C is the wife of D, and A # D means A is the son of D, how is C related to A?
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The weights of three lumps of metal are in the ratio 2 : 5 : 7. By what fractions must the first two be increased so that the ratio of the weights may be changed to 7 : 5 : 2?
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- A cuboid-shaped wooden block has 6 cm length, 4 cm breadth and 1 cm height.
- Two faces measuring 4 cm x 1 cm are coloured in black.
- Two faces measuring 6 cm x 1 cm are coloured in red.
- Two faces measuring 6 cm x 4 cm are coloured in green.
- The block is divided into 6 equal cubes of side 1 cm (from 6 cm side), 4 equal cubes of side 1 cm(from 4 cm side).
How many cubes having red, green and black colours on at least one side of the cube will be formed?
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