Which of the following is a limitation of a computerised accounting system?

• Two successive discounts of $10\%$ and $10\%$
• Buy $7$ and get $8$
• Buy $9$ and get $1$ free

A comparison of marks scored by Gauri, Aaban, Seerat and Alvina in an examination is as follows

$\mathrm{I}.$ Gauri has scored $15$ marks less than Aaban.

$\mathrm{II}$. Gauri has scored $20$ marks more than Seerat.

$\mathrm{III}.$ Alvina has scored $10$ marks less than Seerat.

To decide who has scored the highest marks, identify the statement from those given in the alternatives in respect of sufficiency of data.

A water tank has been fitted with two taps $P$ and $Q$ and a drain pipe $R$. Taps $P$ and $Q$ fill at the rate of $12$ $\mathrm{litres}/\min$  and $10$$\mathrm{litres}/\min$ respectively.
Consider the following statements $S1, S2$ and $S3$-
$S1$: Pipe $R$ drains out at the rate of $6$ $\mathrm{litres}/\min$.
$S2$: If both the taps and the drain pipe are opened simultaneously, then the tank is filled in $5 \mathrm{hr} 45 \min$.
$S3$: Pipe $R$ drains out (fully) the filled tank in $15 \mathrm{hr} 20 \min$.
To know what is the capacity of the tank, which one of the following is correct?

Fact 1: Most stuffed toys are stuffed with beans.

Fact 2: There are stuffed bears and stuffed tigers.

Fact 3: Some chairs are stuffed with beans.

If the first three statements are facts, which of the following statements must also be a fact?

$\mathrm{I}:$ Only children's chairs are stuffed with beans.

$\mathrm{II}:$ All stuffed tigers are stuffed with beans.

$\mathrm{III}:$ Stuffed monkeys are not stuffed with beans.

How many statements are required to answer the given question?

In which year was Sanjay born?

I. Sanjay is six years older than Gopal.

II. Gopal’s brother was born in $1982.$

III. Sanjay’s brother is two years younger than Gopal’s brother who was eight years younger than Gopal.