# CIE Mathematics Paper-1: Specimen Questions 38 - 39 of 175

## Question number: 38

### Write in Short

The diagram shows a pole of length l centimeters.

(a) Mita says that l = 88.2. Round this to nearest whole number.

(b) If the pole has a length 86 cm, to the nearest centimeter. What can be said about l.

### Explanation

Here,

(a) Mita says that l = 88.2 cm.

So, for round this to the nearest whole number we need to see the digit after decimal point, if this digit is 5 or more than 5 then the digit before decimal point will increase by 1.

Here, the digit after decimal point is 2 which is less than 5, so digit 8 which is before decimal point will remain same.

So, length will be: 88 cm after rounding up.

(b) In fact the pole has a length 86 cm, to the nearest centimeter.

Then the nearest length can be:

(I) Less than 86 but more than 85.4: these all will round up and be 86 because digit after decimal point is 5 or more than 5.

(II) More than 86 can be: these all will also round up and be 86 because digit after decimal point is less than 5.