IGCSE Mathematics Paper-1: Specimen Questions with Answers 62 - 65 of 324

Question number: 62

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Short Answer Question▾

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Solve as a single fraction.

Explanation

Here,

Question number: 63

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Essay Question▾

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Solve 0.0000164

(a) In standard form,

(b) Correct to 1 significant figures,

(c) Correct to 6 decimal places

Explanation

Here, number is 0.0000164

(a) For making standard form of 0.0000164 we need to shift the decimal point left to right five times which will give: .

(b) We need to correct 0.0000164 to 1 significant figures (all non-zero digits are called as significant figures) which can be: because here after digit 1 there is 6 which is greater than 5, so 1 will get round up and be 2.

(C) We need to correct 0.0000164 to 6 decimal places which can be: in which we have to consider six numbers after decimal point and the sixth number will be round up on the basis of seventh number.

Here, it means if seventh number is not 5 or more than 5 so sixth number will be as it is.

Question number: 64

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Short Answer Question▾

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When find the value of

Explanation

Here, where

So,

Question number: 65

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At the market, Frederic weighs his fruit to the nearest 10 grams. He weighs an Orange as 170 grams. Complete the statement below.

Explanation

Here, Frederic weighs his fruit to the nearest 10 grams and he weighs an Orange as 170 grams.

  • If weight is 165 to 169 then it will weigh by nearest weight 170 g.
  • If weight is 175 to 171 then it will weigh by nearest weight 170 g.

So, Statement will be like this: .

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