I have the exam tomorrow and... VERY URGENT Watch

MRWAFFLE
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For iGCSE Physics right. CIE.
If the answer to the previous question was 13780 and rounded to 2 sigs to 14000.
For the next question... which of the two values should I be using? If the answer to the question requires the use of the answer to the previous question? 13780 or 14000.
I have seen some mark schemes using the rounded values and some using the exact one.
Although in some cases, whether which value I have chosen, the answer is still the same.
Thanks guys! Very very urgent though
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methylbenzene
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If is an answer, you can round it. If you then use it again in a calculation, use the un- rounded value. Don't round until the end of a calculation
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MRWAFFLE
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Thank you sooo much! But if the answer to the previous was 18.555555....
Then I should use the rounded value? (19)
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methylbenzene
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If it is your final answer, you should have it to (most likely) 3 significant figures eg. 18.6 The exam paper of set of questions will state if you need to use a different number of significant figures in your answer.
If you then have to use it in another calculation, you should use the value of 18.5555555555555... in that calculation. This does not effect how you you should write down the ANSWER to the calculation with which you obtained this number. Am I making sense?
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methylbenzene
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How did it go?
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