Thursday 31 March 2011

Mathematics Enrichment Class Session 2

Here are the questions for this week. I find it rather interesting, hope the same goes for you.

1.     When the same whole number is added to both the numerator and denominator of 2/5 , the value of the new fraction is 2/3 . What number was added to both the numerator and denominator?
2.     When the same whole number is added to both the numerator and denominator of 4/7 , the value of the new fraction is 4/5. What number was added to both the numerator and denominator?
3.     When the same whole number is added to both the numerator and denominator of 2/5, the value of the new fraction is 6/7. What number was added to both the numerator and denominator?
4.     How many two-digit numbers are there in which the tens digit is greater than the ones digit?
5.   How many two-digit numbers are there in which the ones digit is greater than the tens digit?
6.     How many three-digit numbers are there in which the hundreds digit is greater than the tens and the ones digit?
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2 comments:

  1. Anonymous2 April 2011 at 04:51

    Please post the answer key for this so that it would be easier. Thank you!

    ReplyDelete
  2. Mr Koh3 April 2011 at 07:35

    I went through all the answers except Q6. Will post the answers soon after you have tried out!

    ReplyDelete

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