Sobha's father was 38 years of age when she was born while her mother was 36 years old when her brother four years younger to her was born. What is the difference between the ages of her parents

1. 6 years

2. 5 years

3. 4 years

4. 3 years

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Correct Answer :

6 years

Explanation :
No Explanation available for this question

The average of the numbers of a set P, consisting of 20 numbers, is 20. There are 20 numbers in another set Q = {ai: i=1, 2, 3, …...20}. Now, all the 20 numbers, starting from a1 to a20, in that order, are shifted from the set Q to the set P, one after the other. During the process of shifting, it was observed that when the number ai was shifted from set Q to set P, the average of the numbers of set P increased by bi, where b(i+1)-bi = 1, for 1 £i £19. If bi=2, what is the average of the original 20 numbers of set Q

1. 250

2. 230

3. 480

4. 240

5. 62

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Correct Answer :

480

Explanation :
No Explanation available for this question

The age of father 10 years ago was thrice the age of his son. Ten years hence, father's age will be twice that of his son. What is the ratio of their present ages

1. 7 : 3

2. 3 : 7

3. 9 : 4

4. 4 : 9

View Answer

Correct Answer :

7 : 3

Explanation :
No Explanation available for this question

The product of three numbers is 1620. If the HCF of any two out of the three numbers is 3, what is their LCM

1. 180

2. 135

3. 90

4. 270

5. 288

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Correct Answer :

180

Explanation :
No Explanation available for this question

If the total number of ants and beetles initially is 13 and 27 respectively, then the total number of survivors after the two files completely cross each other is

1. 18

2. 19

3. 22

4. 20

5. None of these

View Answer

Correct Answer :

Explanation :
No Explanation available for this question

If the size of the file of ants is 13, then the minimum file size of the beetles such that the casualties on either side are the same is

1. 33

2. 35

3. 32

4. 31

5. 39

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Correct Answer :

Explanation :
No Explanation available for this question

Little Euclid was playing with a cuboidal box, with a square base, and 14 identical wooden spheres. He observed that he could snugly and perfectly layer comprising three rows and three columns. He then placed another layer of four spheres, stably sphere in the second layer touched exactly four spheres of the bottom layer. Finally he placed the last sphere, stably and symmetrically, on top of the second layer and observed that he could then just close the lid of the box. Find the ratio of the height of the box to the radius of each sphere

1. 2(2√3-1)

2. 2(2√2+1)

3. 2(2√3+1)

4. 3(2√2-1)

5. None of these

View Answer

Correct Answer :

2(2√2+1)

Explanation :
No Explanation available for this question

The ages of two persons differ by 16 years. 6 years ago, the elder one was 3 times as old as the younger one. What are their present ages of the elder person

1. 10

2. 20

3. 30

4. 40

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Correct Answer :

Explanation :
No Explanation available for this question

This year, during the months of January and February, every day Ramu went to a fruit shop and bought three varieties of fruits, such that when any two days are considered, he bought at least one variety of fruit on one of the days that was different from what he bought on the other day. What is the minimum number of different varieties of fruits he could have bought during that period

1. 9

2. 8

3. 18

4. 60

5. 14

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Correct Answer :

Explanation :
No Explanation available for this question

The present age of a father is 3 years more than three times the age of his son. Three years hence, father's age will be 10 years more than twice the age of the son. What is father's present age

1. 30 years

2. 31 years

3. 32 yeas

4. 33 years

View Answer

Correct Answer :

33 years

Explanation :
No Explanation available for this question

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