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

## Question 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 271

### Write in Short

Find T when n = 64.

### Explanation

Here given the n=64

## Question 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 273

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 274

### Write in Short

Solve the equations