" Find "14+17+6" in two ways."

Find: 14 div 5/6

14 persons are seated at a round table. Find the number of ways of selecting two persons out of them who are not seated adjacent to each other.

Each of the series 13 + 15 + 17 + .... and 14 + 17 + 20 + ... is continued to 100 terms. Find how many terms are identical between the two series?

If the mean of 17, 10, 12, p and 13 is 14, find the value of P.

Find the number of ways of arranging 6 boys and 6 girls in a row so that no two boys sit together

Given that carbon-14 (C_(14)) decays at a constant rate in such a way that it is reduced to 25% in 1244 years. Find the age of a tree in which the carbon is only 6.25% of the original.

If the number is 17^(256) , find the last two digits