CIE Mathematics Paper-1: Specimen Questions 28 - 30 of 175

Question number: 28

Short Answer Question▾

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Mention order of rotational symmetry.

Square having filled parts

Square having filled parts

Find the order of rotational symmetry of given question figure

Explanation

Here, The order of rotational symmetry is that an object has the number of times that it fits on to itself during a full rotation of 360 degrees.

  • So, here given image will rotate and can fit in itself at 1800and3600 means two times.
  • So, order of symmetry of given image is 2.

Question number: 29

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(a) Expand the bracket and simplify the expression 9x+32(5x6).

(b) Factorize 8x22x .

Explanation

Here,

(a) Expression is 9x+32(5x6):

9x+310x+12

x+15

15x

(b) Factorization is the decomposition of an object into a product of other objects or factors which will give the original object after multiplication.

So, 8x22x=2x(4x1).

Question number: 30

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There are approximately 500000 grains of wheat in a 2 kilogram bag.

(a) Find mass of one grain in grams.

(b) Write answer in standard form.

Explanation

Here,

(a) Here, 500000 grains of wheat in a 2 kilogram bag.

So, 500000 grains = 2000 grams

1 grain =? Grams

So, 2000500000=0.004gramsismassofonegrain.

(b) Standard form of 0.004 .

So, for making standard form we need to shift decimal point from left to right three times.

So, it will be: 4×103 .

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