CIE Mathematics Paper-1: Specimen Questions 131 - 132 of 175

Question number: 131

Short Answer Question▾

Write in Short

(a )6x×65=617 . Find the value of x.

(b) 5y÷58=512 . Find the value of y.

(c) 9a=181 . Find the value of a.

Explanation

Here,

(a )6x×65=617

So, 6x+5=617 because multiplication of same based term will give addition of their exponent.

x+5=17 because base is same of all exponents.

x=175x=12.

(b) 5y÷58=512

So, 5y8=512 because division of same based term will give subtraction of their exponent.

y8=12 because base is same of all exponents.

y=12+8y=20.

(c) 9a=1819a=1929a=92a=2 .

Question number: 132

Short Answer Question▾

Write in Short

(a) George going to Germany in his summer vacation. He changed £900 into euros () when the rate was £1=1.39 after reached in Germany. How many euros did he receive?

(b) Write 9.568 correct to 2 significant figures.

Explanation

Here,

(a) George changed £900 into euros () when the rate was £1=1.39.

So, £1=1.39

Then £900=?

900×1.391=1251 he received.

(b) 9.568 correct to 2 significant figures means there will be total of 2 digits:

  • So, we will get 9. 6 because after digit 5 there is 6 which is greater than 5, so 5 will get round up and be 6.
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