Wednesday, December 14, 2011

How to do number 16 and 17 on Number of the day

Number 17- make a two digit number using the digit in ones place
first and the tens place second.
eg. 43 from December 7
Number: 9834.765
Then find from the prime factors
43-1, 43
so 43 is the only prime factor
1 is not prime.

Number 16- Only look at the whole number

Then go through the divisibility rules.

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