# The ratio of the present ages of Rahul and Rashmi is 2 : 1. The ratio of their ages after 30 years will be 7 : 6. What is the present age of Rahul

1.  6 years

2.  10 years

3.  12 years

4.   20 years

4

12 years

Explanation :
No Explanation available for this question

# In an examination, the number of those who passed and the number of those who failed were in the ratio 25 : 4. If five more had appeared and the number of failures was 2 less than earlier, the ratio of passers to failures would have been 22: 3. The number who appeared at the examination, is

1.  145

2.  150

3.  155

4.   180

4

145

Explanation :
No Explanation available for this question

# If the circumventer of a triangle lies outside it, then the triangle is

1.  Equilateral

2.  Acute angled

3.  Right angled

4.   Obtuse angled

4

Obtuse angled

Explanation :
No Explanation available for this question

# If ax + by = 3, bx -ay = 4 and x2 + y2 = 1, then the value of a2 + b2 is

1.  17

2.  16

3.  9

4.   25

4

25

Explanation :
No Explanation available for this question

# The length, breadth and height of a cuboids are in the ratio 1 : 2 : 3. If they are increased by 100%, 200% and 200% respectively, then, compared to the original volume the increase in the volume of the cuboids will be

1.  5 times

2.  18 times

3.  12 times

4.   17 times

4

17 times

Explanation :
No Explanation available for this question

# If a + b =-1 and a3 + b3 + 3ab = k, then the value of k is

1.  1

2.  3

3.  5

4.   7

4

1

Explanation :
No Explanation available for this question

# The number of students in three classes are in the ratio 2 : 3 : 5. If the number of students in each class is increased by 20 ^ the ratio becomes 4:5: 7. The total number of students before the increase was

1.  80

2.  90

3.  100

4.  120

4

100

Explanation :
No Explanation available for this question

# The price of sugar is increased by 20%. If the expenditure on sugar has to be kept the same as earlier, the ratio between the reduction in consumption and the original consumption is

1.  1 : 3

2.  1 : 4

3.  1 : 6

4.  1 :5

4

1 : 6

Explanation :
No Explanation available for this question

# If a :b:c = 7 : 3 : 5, then (a + b + c) : (2a + b - c) is equal to

1.  1 : 2

2.  2 : 3

3.  3 : 4

4.   5 : 4

4

5 : 4

Explanation :
No Explanation available for this question

1.  13.4%

2.  14.33%

3.  14.4%

4.   13.33%

4