09 July, 2009

Place Value and Palindromes

Through learning conversations in class, we have realised that not everyone understands place value. So here is a chance for you and your parents to work together on some place value and palindrome riddles, you could even come up with some of your own to post for others to try and work out.

The riddles below are courtesy of www.rhlschool.com . Thank you Bob for letting us post this on our blog. As with any published work, there is a copyright, and part of the process I had to go through, was ask the people at rhlschool, if I could use these riddles. Just to get you thinking a little more about this. Do you think copyrighting is a good idea?

Place Value and Palindrome Riddles

1. I am a three digit number. I am less than 500. I am greater than 200. All my digits are odd. If you take each of my three digits and add them together, they equal 5. What number am I?

2. I am a four digit number. I have a one in my thousands place, and a two in my hundreds place. I am a palindrome. (A palindrome reads the same, forwards and backwards. The words “pop” and “level” are palindromes. The numbers “747" and “842248" are palindromes.) What number am I?

3. I am a palindrome. I am >11 (greater than eleven) and <50 (less than 50). I am an odd number. What number am I?

4. I am also a palindrome. I am greater than the number of days in a year and less than the product of 19 and 20. What number am I?

5. I’m a seven digit number. Six of my digits are zeros. I am the greatest number possible with those characteristics. What number am I?