# IGCSE Mathematics Paper-1: Specimen Questions with Answers 270 - 275 of 324

## Question number: 270

Edit

### Write in Short

Find the circumference of a circle of radius 7.1 cm.

Correct to the nearest centimeter.

### Explanation

• Circumference of circle is 44.588

• Here find the nearest centimeter.

• So, the answer is 45 cm.

## Question number: 271

Edit

### Write in Short

Find T when n = 64.

### Explanation

1. Here given the n = 64

## Question number: 272

Edit

### Write in Short

There are 10 boys and 15 girls in a choir.

The teacher chooses one choir member at random.

What is the probability that this is a girl?

### Explanation

• Given that the number of boys and girls in a choir is a follows:

• Number of boys = 10

• Number of girls = 15

• Then we conclude that the total number of students in the class = 25 students.

## Question number: 273

Edit

Factor

### Explanation

• Here polynomial has four terms, you may be able to factor by grouping

• If the expressions in brackets match, you can factor by grouping:

• Factor by grouping.

Apply the distributive property

## Question number: 274

Edit

### Write in Short

Solve the equations

Edit