IGCSE Mathematics Paper-1: Specimen Questions with Answers 276 - 281 of 324

Question 276

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From the list above, write down

A prime number,

Explanation

  • A prime number is a whole number greater than 1 whose only factors are 1 and itself.
  • In this number is prime number
  • Because
  • And 2 is a prime number.

Question 277

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Expand and simplify

Explanation

Question 278

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Simplify

Explanation

Here given the

Question 279

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the sequence of diagrams

The Sequence of Diagrams

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Look at the sequence of diagrams above.

The number of dots in each diagram is given in the table below.

The number of dots

The Number of Dots

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Find the number of dots in

Diagram 50,

Explanation

For this sequence the diffrence between each diagram and next diagram is 3.

Here

Here apply this equaion

The number of dots in 50th diagram is 160.

Question 280

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The diagram shows half of a circle, centre O.

The Diagram Shows Half of a Circle, Centre O

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Calculate the perimeter of the shape.

Explanation

  • The perimeter is Where r is the radius and d is the diameter Here it is a semicircles, that is half the circle is the perimeter Here

Question 281

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Factories

Explanation

Take the common terms

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