IGCSE Mathematics Paper-1: Specimen Questions with Answers 320 - 324 of 324

Question number: 320

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Solve the simultaneous equations.

Explanation

Here given the 2 equations

……………………. (1)

………………………. (2)

Equation 1 multiplied by 2

……………………. (3)

x value put in equation 1

Question number: 321

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The price of an item changed from $150 to $130. Then later the price decreased again from $130 to $100. Which of the two decreases was larger in percentage term?

Explanation

  • First decrease in percent

  • second decrease in percent

  • The second decreases was larger in percent term.

Question number: 322

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Points A, B and C are shown on the grid

Points a, B and C Are Shown on the Grid

Write as a column vector.

Explanation

  • Here coordinates is

  • The coordinates of the vector are

Question number: 323

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Write down the values of

, , , ,

Explanation

  1. Here given the

Question number: 324

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Find the lowest common multiple of 3 and 7

Explanation

  • Since the only number 3 and 7 go into evenly is 21.

  • A lowest common multiple is the smallest unit that both numbers can evenly be divided by.

  • Since you can evenly divide 21 by both 3 and 7 the following is true.

  • 21 is the lowest common multiple of 3 and 7.

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