The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

Number System
The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

25 years

21 years

18 years

15 years

25 years

21 years

18 years

15 years

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Number System
In a 150-litre mixture of milk and water, the percentage of milk is 84%. How much water should be added so that the percentage of milk becomes 52.5% ?

85 litre

90 litre

95 litre

80 litre

85 litre

90 litre

95 litre

80 litre

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Number System
If the fraction 8/6, 7/5, 18/13, 9/5 and 7/11 are arranged in descending order of their values, which one will be the second ?

3/4

7/5

2/7

1/9

3/4

7/5

2/7

1/9

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Number System
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:

40

30

None of these

20

40

30

None of these

20

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Number System
If the difference between a number and its 2/5 is 240, find the number.

440

480

360

400

440

480

360

400

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Number System
Letters of the word SERIES are arranged in such a way that all the vowels always come together. What is the total number of ways of making such an arrangement ?

36

112

72

98

36

112

72

98

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Number System

Number System The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

Number System In a 150-litre mixture of milk and water, the percentage of milk is 84%. How much water should be added so that the percentage of milk becomes 52.5% ?

Number System If the fraction 8/6, 7/5, 18/13, 9/5 and 7/11 are arranged in descending order of their values, which one will be the second ?

Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:

Number System If the difference between a number and its 2/5 is 240, find the number.

Number System Letters of the word SERIES are arranged in such a way that all the vowels always come together. What is the total number of ways of making such an arrangement ?

Number System
The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

Number System
In a 150-litre mixture of milk and water, the percentage of milk is 84%. How much water should be added so that the percentage of milk becomes 52.5% ?

Number System
If the fraction 8/6, 7/5, 18/13, 9/5 and 7/11 are arranged in descending order of their values, which one will be the second ?

Number System
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:

Number System
If the difference between a number and its 2/5 is 240, find the number.

Number System
Letters of the word SERIES are arranged in such a way that all the vowels always come together. What is the total number of ways of making such an arrangement ?