If X is 20% less than Y, then find the value of $${Y-X\over Y}$$ and $${X\over X-Y }$$

60% boys are failed in History and 65% boys are failed in Geography while total 30% boys are failed in both the subjects. If total 1200 boys appeared in the examination then total how many boys are passed?

If sec -5π/4 = x, then  the value   of x is

Directions: The bar chart given below shows the percentage distribution of the production of various models of a mobile manufacturing company in 2007 and 2008. The total production in 2007 was 35 lakh mobile phones and in 2008 the production was 44 lakh. Study the chart and answer the following questions.
Percentage of six different types of mobiles manufactured by a company over two year

If 85% of the D type mobile produce in each year were sold by the company, how many D type mobiles remained unsold?

The total number of integers between 100 and 200, which are divisible by both 9 and 6, is 

Directions: The bar graph given below shows the spending of family income on various items and savings during 1993. Observe the graph and answer the following questions:

The percent of income spent on clothing exceeds that on savings by : 

If the length of one side and the diagonal of a rectangle are 7 cm and 25 cm respectively, then find its perimeter (in cm).

If $$ {66{2\over 3}}{ \%}$$ of 75 % of one-eighth of a certain number is 179, then $$ {33{1\over 3}}{ \%}$$ of three – fourth of that number is: