# IGCSE Mathematics Paper-1: Specimen Questions with Answers 54 - 57 of 324

## Question 54

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### Write in Short

When find the value of

Here, where

So,

## Question 55

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### Write in Short

Find value of as a fraction.

Here,

## Question 56

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### Write in Short

(a) (i) Write both numbers in the calculation above correct to one significant figure.

(ii) Use your answer above to estimate the value of the calculation.

(b) Find the value of the calculation correct to two significant figures.

### Explanation

Here,

(a) (i) Number 343 correct to one significant figure will be: , where 3 is significant figure while both 0s are at left side of decimal point which are not significant.

Number 57 correct to one significant figure will be: 60 6because in the number after 5 there is 7 which is greater than 5 so 5 will be increased by 1 and be which is significant figure while 0 is at left side of decimal point which is not significant.

So,

(ii) Answer of will be 5 which is estimate value of

(b) Calculation of will be: 6.017.

Now, 6.017 correct it to two significant figures: 6.0 where 6 and 0 are significant.

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