# IGCSE Mathematics Paper-1: Specimen Questions with Answers 120 - 123 of 175

## Question number: 120

### Write in Short

Solve the linear equations

### Explanation

Here,

**Linear equations** are those who have the **unique solutions**.

Equations are

Now, add equation (II) into (I),

Now, multiply equation (III) by 2 and add into (II),

Now, put into equation (IV),

Now, put and into equation (I),

Thus,

## Question number: 121

### Describe in Detail

Solve with detailed working:

(a)

(b)

### Explanation

Here,

(a) Left Hand Side (LHS) =

Right Hand Side (RHS) =

Thus, LHS = RHS.

(b) Left Hand Side (LHS) =

Right Hand Side (RHS) = .

Thus, LHS = RHS.

## Question number: 122

### Write in Short

Ravi’s height is 159 cm, to the nearest centimeter. Complete the statement about the limits of his height.

### Explanation

Here, He is greater than or equal to 158.5 centimeters but less than 159.5 centimeters.

In mathematical form:

## Question number: 123

### Write in Short

The image shows Indian Flag.

(a) Given that length of Indian Flag is 1.5 times more than that of width, if width of flag is 60 cm, find length of the Indian flag.

(b) If ratio of width and length of flag is 2: 3, if length is 900 mm, find width of the flag.

### Explanation

Here,

(a) Length of Indian Flag is 1.5 times more than that of width and width of flag is 60 cm.

So, 2 times means , but here 1.5 times means .

So, length will be 90 cm.

(b) Here, ratio of width and length of flag is 2: 3.

Length is 900 mm. Let’s take width = w.

So, ratio will be: .