Showing Mcqs of math -- (543)

 If 0.4: 1.4:: 1.4: x, the value of x is:

49

0.49

4.9

0.4

if 0.4 of a number is equal to 0.06 of another number, then the ratio of the numbers is

3:2

3:4

3:20

20:3

  The average age of three boys is 25 years and their ages are in the proportion 3:5 :7. The age of the youngest boy is 

12 years

8 years

15years

none of these

20 liters of a mixture contains milk and water in the ratio 5: 3. If 4 liters of this mixture are replaced by 4 liters of milk, the ratio of milk to water in the new mixture will become:

2:1

7:3

8:3

4:3

 What percentage is equivalent to 5? 

525%

625%

725%

none of these

6 2/3% expressed as a fraction in its lowest term is 

2/15

1/15

3/15

4/20

What per cent of 12 is 84?

8000%

6000%

7000%

none of these

 Express 7/ 8 as percentage.

67 1/2 %

87 1/2%

97 1/2%

none of these

 If 200% of a number is 90, then what is the 80% of that number

48

38

24

36

If 12% of x is equal to 6% of y, then 18% of x will be equal to b much per cent of y? 

7%

9%

11%

none of these