# IGCSE Mathematics Paper-1: Specimen Questions with Answers 319 - 324 of 324

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## Question 319

### Write in Short

Choose one of the symbols given above to complete each of the following statements.

When x = 12 and y =-4, then

### Explanation

• Here x = 12 and y =-4
• So,
• So,

## Question 320

### Write in Short

Solve the simultaneous equations.

### Explanation

Here given the 2 equations

… (1)

… (2)

Equation 1 multiplied by 2

… (3)

x value put in equation 1

## Question 321

Edit

### Write in Short

The price of an item changed from \$ 150 to \$ 130. Then later the price decreased again from \$ 130 to \$ 100. Which of the two decreases was larger in percentage term?

### Explanation

• First decrease in percent

• second decrease in percent

• The second decreases was larger in percent term.

## Question 322

### Write in Short

Write as a column vector.

### Explanation

• Here coordinates is
• The coordinates of the vector are

## Question 323

### Write in Short

Write down the values of

Here given the

## Question 324

Edit

### Write in Short

Find the lowest common multiple of 3 and 7

### Explanation

• Since the only number 3 and 7 go into evenly is 21.
• A lowest common multiple is the smallest unit that both numbers can evenly be divided by.
• Since you can evenly divide 21 by both 3 and 7 the following is true.
• 21 is the lowest common multiple of 3 and 7.

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