# IGCSE Mathematics Paper-1: Specimen Questions with Answers 89 - 91 of 324

## Question 89

### Write in Short

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

### Explanation

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

Explanation: Here,

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

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

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

So, Money for 700 ml = ? ₹

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

So, both bottles have better values.

## Question 90

### Write in Short

Short Answer▾A note of 10 rupees of India like a rectangle is having 137 mm of width and 63 mm of height. Calculate the area of the note.

[The area of a rectangle, width w, height h, is .]

### Explanation

Here, note is having the shape like a rectangle with 137 mm of width and 63 mm of height.

We need to find the area of the note, so formula of a rectangle area: , which is given,

So, **area of note** =

## Question 91

### Write in Short

Short Answer▾The surface area of the Moon is 37 900 000 . Write this number in standard form.

### Explanation

Here,

(a) The surface area of the Moon is 37 900 000

So, standard from will be: