CIE Mathematics Paper-1: Specimen Questions 174 - 175 of 175

Question number: 174

Short Answer Question▾

Write in Short

Harshad changed Rs. 75000 into euros with exchange rate was €1 = 79 Rs. How many euros did he receive?

Explanation

Here, €1 = 79 Rs.

  • Harshad changed Rs. 75000 into euros.
  • Where, exchange rate was 79Rs.=1.

So, 75000Rs.=?

  • So, he received 7500079=949.37.

Question number: 175

Essay Question▾

Describe in Detail

Write 0.0006584

(a) In standard form,

(b) Correct to 1 significant figures,

(c) Correct to 3 decimal places

Explanation

Here, number is 0.0006584

(a) For making standard form of 0.0006584 we need to shift the decimal point left to right four times which will give: 6.584×10000=6.584×104 .

(b) We need to correct 0.0006584 to 1 significant figures (all non-zero digits are called as significant figures) which can be: 0.0007 because here after digit 6 there is 5, so 6 will get round up and be 7.

(C) We need to correct 0.0006584 to 3 decimal places which can be: 0.001 in which we have to consider three numbers after decimal point and the third number will be round up on the basis of fourth number.

Here, it means if fourth number is 5 or more than 5 then third number will be round up and be 7 from 6.

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