Consider the following Reason and Assertion and choose the correct answer from the codes
given below :
Reason (R) : The diet of the early Tamils was not very different from that of modern times.
Ghee played a conspicious part in the diet of all, it fetched a high price.
Assertion (A): Ghee was used freely both by vegetarian and non vegetarian Avur Mulankilar and Purattinai Nannaganar spoken of the use of ghee.

Choose the correct answer from the codes given below :
Assertion (A) : The Indian National Movement reached its crescendo in the non-co
operation movement in 1920-22. It was in this context that there occured a resurgence of working class activity in the years 1920-22. The working class created its own organisation to defend its class rights.
Reason (R): Lokamanya Tilak was one of the moving spirits in the formation of AITUC. AITUC was formed in 1920.

What is the standard deviation of the first n natural numbers?

In the series
6 4 1 2 2 8 7 4 2 1 5 3 8 6 2 1 7 1 4 1 3 2 8 6
How many pairs of alternate numbers have a difference of 2?

If + means X, X means -, $\div $ means + and - means $\div $ then what is the value of (175-25)$\div $(5 +20)x (3 +10)

In a geometric series, if the fourth term is $\dfrac{2}{3} $and seventh term is $\dfrac{16}{81}$ then what is the first term of the series?

Find the percentage increase in the area of a triangle if its each side is doubled.

The sequence follow a regular pattern. Find the correct letter for question nark, to complete the sequence.
C E I K O Q ?

Find Least Common Multiple of $\dfrac{4}{5} $,$\dfrac{3}{10} $ and $\dfrac{7}{15} $

Three numbers are in the ratio 1 : 2 : 3. Their highest common factor is 12. Find the numbers