# IGCSE Mathematics Paper-1: Specimen Questions with Answers 139 - 141 of 175

## Question number: 139

### Describe in Detail

Simplify

(a)

(b) ,

(c)

### Explanation

Here,

(a) Because 0 power always gives value 1.

(b) Because multiplication of two terms with same base will add its exponents which is first exponent rule.

(c) Because it is an exponent expression that is raised to a power, so we can multiply the exponent and power which is second exponent rule.

## Question number: 140

### Write in Short

Month | Jan | Feb | Mar | Apr | May | June | July | Aug | Sep | Oct | Nov | Dec |

Rain fall (mm) | 52 | 39 | 35 | 43 | 50 | 43 | 41 | 48 | 49 | 71 | 63 | 53 |

(a) Which month has the lowest average Rainfall?

(b) Find the difference between the average Rainfall in February and October.

### Explanation

Here,

(a) Here, as we can see in the table, lowest average Rainfall is in **March** which is **35mm. **

(b) Here, average rainfall of February is 39 mm and October is 71 mm.

So, difference between both is: **, **which means in October rainfall is 32 mm higher than in February.

## Question number: 141

### Write in Short

The line with equation passes through the point (-11,2). Find k.

### Explanation

Here, equation is and point passing through it is (-11,2).

- So, (x, y) = (-11,2) put it in the equation: