CIE Mathematics Paper-1: Specimen Questions 47 - 49 of 175

Question number: 47

Short Answer Question▾

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Make d the subject of the formula: ab=abcde.

Explanation

Here, formula is ab=abcde.

So, de=abcab

de=ab(c1)

d=ab(c1)e

Question number: 48

Short Answer Question▾

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In the diagram, PQ, RS and MN are parallel lines. Angle PQR=300 and angle RMN=1450 . Calculate angle QRM.

Three parallel lines PQ, RS and MN

Three parallel lines PQ, RS and MN

Three parallel lines making some angle with each other

Explanation

Here, PQ, RS are straight lines.

  • So, angles PQR and QRS will be alternate interior angles which will be always same.
  • So, angle S=300 .
  • Now, RS and MN are also straight lines, so R and M will be supplementary angles which adding gives 1800.

So, SRM+RMN=1800SRM+1450=1800SRM=350

Now, QRM=QRS+SRMQRM=300+350QRM=650 .

Question number: 49

Short Answer Question▾

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Rosely changed a traveler’s cheque for 500 pounds ( £ ) into dollars ($) when she visited the USA. The exchange rate was 1 pound = 1.54 dollars. How many dollars did she receive?

Explanation

Here,

1 pound = 1.54 dollars.

Now, Rosely wants To change 500 pounds into dollars.

So, 1 pound = 1.54 dollars

500 pounds =? dollars

500×1.54=770dollars .

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