Two students appeared at an examination. One of them secured 9 marks more than the other and his marks were 56 % of the sum of their marks. The marks obtained by them are: 

Study the following information carefully to answer the questions.
The teachers' colony has 2800 members, out of which 650 members read only English newspaper. 550 members read only Hindi newspaper and 450 members read only Marathi newspaper. The number of members reading all the 3 newspapers is 100. Members reading Hindi as well as English newspapers are 200. 400 members read Hindi as well as Marathi newspaper and 300 members read English as well as Marathi newspaper.

Find the difference between number of members reading English as well as Marathi newspaper and the number of members reading English as well as Hindi newspaper.

Find the value of x:
2³ × 3⁴ × 1080 ÷ 15 = 6^x

The average of seven numbers is 18. If one of the number is 17 and if it is replaced by 31, then the average becomes: 

If $$ {x+{1\over {x}}=1}$$, then find the value of $$ {x^{208}+{x^{205}+x^{204}+x^{201}}}$$.

The measure of the angles of a triangle are in the ratio 2 : 7 : 11. Measures of angles are : 

A vertical stick 12 cm long casts a shadow 8 cm long on the ground. At the same time, a tower casts a shadow 40 m long on the ground. The height of the tower is 

Directions:  The table given below presents the number of books on different subjects kept on separate shelves subjects with odd and even numbers are of arts and Science respectively

Find the ratio of S1: S7.