If a > b, then for two 3-digit numbers abc and cba; we have abc - cba equal to :

1. -27

2. -6

3. 6

4. none of these

For

$\begin{matrix} & 3 & 2 & \text{A} \ + & 1 & \text{A} & 1 \ \hline & 5 & 0 & 9 \ \hline \end{matrix}$

the value of A is :

1. 3

2. 5

3. 8

4. none of these

Without actual calculation, the quotient when 74 – 47 is divided by 9, is :

1. 11

2. 7

3. 3

4. none of these

The smallest two digit number 10a + 4 is divisible by 6, if a + 4 is divisible by :

1. 2

2. 6

3. 3

4. none of these