The sum of nine consecutive odd numbers of Set $A$ is $621$. What is the sum of a different set of six consecutive even numbers whose lowest number is $15$ more than the lowest number of Set $A$?

$[(3^{2})^{6}]^{5} = 9^{?}$

The price of commodity $X$ increases by $40 \text{ paise}$ every year,while the price of commodity $Y$ increases by $15 \text{ paise}$ every year. If in $2001$,the price of commodity $X$ was $Rs. 4.20$ and that of $Y$ was $Rs. 6.30$,in which year will commodity $X$ cost $40 \text{ paise}$ more than commodity $Y$?

When $335$ is added to $5A7$, the result is $8B2$. $8B2$ is divisible by $3$. What is the largest possible value of $A$?

The least number which when divided by $6, 9, 12, 15, 18$ leaves the same remainder $2$ in each case is

The last digit,that is,the digit in the unit's place of the number $[(57)^{25}-1]$ is