Investigating Number Statements
Due Friday 14th February 2014
Your maths mission this week is to investigate a range of number statements involving known multiples and odd & even numbers.
Group 1 and 2
- Half way between any 2 multiples of 10 is a multiple of 5.
- Any odd number is double a number add 1.
- A number is not a multiple of 5 if it does not end in 5 or 0.
- A multiple of 6 is also a multiple of 3.
- If you add and odd and even number together, the answer is always even.
- If you times and whole number by 10, the answer will end in a zero.
- Every multiple of 6 is twice a multiple of 2.
- If you add together the digits in any multiple of 9, the answer will be 3.
- Multiples of 4 always end in 2, 4, 6 or 8.
- The sum of 3 odd numbers is odd.
Extension
– Can you make up some of your own number statements for a partner to
investigate, based on multiples or odd/even numbers?
Group 3 and 4
- The sum of 3 odd numbers is odd.
- If you add and odd and even number together, the answer is always even.
- A multiple of 9 is also a multiple of 3.
- Dividing a number by 100 moves every digit 2 places to the right.
- The product of any three consecutive numbers is always even.
- The product of any 2 odd numbers is always odd.
- A number is a multiple of 4 if its last two digits are divisible by 4.
- Every multiple of 12 is three times a multiple of 4.
- If you add together the digits in any multiple of 90, the product will be 9.
- Multiples of 4 always end in 2, 4 or 8.
