If  $$\sqrt{2}=1.414$$, the value of $${ \sqrt{2}-1\over\sqrt{2}+1}$$  is nearest to 

The prices of two articles are in the ratio 3 : 2 respectively. The price of the first article is increased by 40% and that of the second article is decreased by x%. If the new ratio of both the articles is : 7 : 3 then what is the value of x?

A shopkeeper gains 20 percent by giving a discount of 10 percent of the marked price of a toy. If he had given a discount of 20 percent, then what would be his profit percentage?

If the average of 11, 23 and x is 40, then what is the value of x?

When the integer n is divided by 7, the remainder is 3. What is the remainder if 5n divided by 7?

The lengths of the parallel sides of a trapezium are 51 cm and 21 cm, and that of each of the other two sides is 39 cm. what is the area ( in cm²) of the trapezium?

The following pie chart gives the measures of the central angles of the sectors that reflect the number of beds in each of 7 different hospitals with respect to the total number of beds in these 7 hospitals taken together.
 
 

If the number of beds in H7 are 39, then what is the total number of beds in all the 7 hospitals taken together?

One side of the rectangular ground is 8m and its diagonal is 17m. Find the area of the ground?