# IGCSE Mathematics Paper-1: Specimen Questions with Answers 87 - 89 of 175

## Question number: 87

### Write in Short

Solve .

### Explanation

Here, equation is

## Question number: 88

### Write in Short

The net of a solid is drawn accurately below.

Write down the special name for

(a) The triangles shown on the net,

(b) The solid.

### Explanation

Here,

(a) The triangles shown on the net are **equilateral triangles**, because middle triangle’s edges having adjacent triangles fit with it.

- Equilateral Triangles are those which have equal length of sides.

(b) The solid of net image will called as **Regular Pyramid** or **Triangular Pyramid**.

- A regular pyramid has three equilateral triangles and three identical isosceles triangle sides.

## Question number: 89

### Write in Short

Hand wash liquid is sold in two sizes, 700 ml and 1.6 liter.

### Explanation

A contains 700 ml and costs 70 Rs. B contains 1.6 liters and costs 160 Rs. Which is the better value for money?

Explanation: Here,

Bottle A contains 700 ml for 70 Rs. and B contains 1.6 liters and costs 160 Rs.

So, for comparison of both bottles we need to convert liter into ml.

Now, for B: 1.6 liter (1600 ml) = 160 Rs.

So, Money for 700 ml =? Rs.

Thus, money for 700 ml for **A = 70** Rs. and money for 700 ml for **B = 70 Rs.** which is equal for both.

So, both bottles have better values.