Q. The world population growth rate at a certain reference year was 3.5%. Assuming exponential growth of population, after how many years, the population of the world would have increased by a factor 16 ?

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Q. A person writes all the numbers from 0 to 99. The number of times digit 3 will be written is

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Q. Starting from point A, Ajit walks 14 metres towards west, he then turns to his right and walks 14 metres and then turns to his left and walks 10 metres. He again turns to his left and walks 14 metres and reaches to the point E. The shortest distance between A and E is

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Q. The missing term in the series 2, 7, 24, 77, ?, 723 is

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Q. In certain city the Taxi charges comprise of a fixed charge and the charge of the distance travelled. A person paid Rs.156 for a journey of 16 km and another person paid Rs.204 for the journey of 24 km. The amount paid by a passenger who has travelled 30 km is

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Q. In a certain cricket tournament 45 matches were played. Each team played once against each of the other teams. The number of teams participated in the tournament is

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Q. The missing number in the series
40, 120, 60, 180, 90, ?, 135 is

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Q. The odd numbers from 1 to 45 which are exactly divisible by 3 are arranged in an ascending order. The number at 6th position is

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Q. The mean of four numbers a, b, c, d is 100. If c = 70, then the mean of the remaining numbers is

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Q. If the radius of a circle is increased by 50%, the perimeter of the circle will increase by

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Q. The missing number in the series :

0, 6, 24, 60, 120, ?, 336, is

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Q. A group of 7 members having a majority of boys is to be formed out of 6 boys and 4 girls. The number of ways the group can be formed is

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Q. The number of observations in a group is 40. The average of the first 10 members is 4.5 and the average of the remaining 30 members is 3.5. The average of the whole group is

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Q. The sum of the ages of two persons A and B is 50. 5 years ago, the ratio of their ages was 5/3. The present age of A and B are

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Q. Let a means minus (–), b means multiplied by (ᵡ), C means divided by (÷) and D means plus (+). The value of 90 D 9 a 29 C 10 b 2 is

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Q. Which is the number that comes next in the following sequence?
2, 6, 12, 20, 30, 42, 56, …………

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Q. The price of petrol increases by 25%. By what percentage must a customer reduce the consumption so that the earlier bill on the petrol does not alter?

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Q. If Ram knows that y is an integer greater than 2 and less than 7 and Hari knows that y is an integer greater than 5 and less than 10, then they may correctly conclude that

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Q. Four pipes can fill a reservoir in 15, 20, 30 and 60 hours respectively. The first one was opened at 6 AM, second at 7 AM, third at 8 AM and the fourth at 9 AM. When will the reservoir be filled ?

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Q. What is the number that comes next in the sequence?
2, 5, 9, 19, 37, __

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