The smallest five digit number which is exactly divisible by 12, 15 and 18 is:

$-224 + (-314) \times 9 = ?$

The difference of the greatest and the smallest of the fractions $\frac{1}{2}$, $\frac{8}{11}$, $\frac{7}{8}$, $\frac{7}{9}$, $\frac{5}{6}$ is:

In number system 3√2, is?

If m and n are distinct natural numbers, then which of the following is/are integer(s)?

(A) $m/n + n/m$

(B) $mn(m/n+n/m)(m^2 + n^2)^{-1}$

(C) $mn/(m^2 + n^2)$

Choose the correct answer from the options given below:

The value of $\left(\frac{x}{y}\right)^{2a-3b} \times \left(\frac{x}{y}\right)^{3b-4c} \times \left(\frac{x}{y}\right)^{4c-2a}$

How many times does the digit 3 appear in the counts from 1 to 100?