Problem solving
We have been doing about problems in maths. Some have been really tricky but some are easy.
And today we looked at this question:every year a person gets their age in candles eg.when 1 years old 1 candle.
Altogether how many candles would the person have blown out at 75 years old.
Please post a comment.
February 16th, 2007 at 9:10 am
It looks to me that you would have to add up 75+74+73+72 …..+2+1 but have you found an easier way to do it?
February 16th, 2007 at 12:53 pm
The first and last numbers are 1 and 75, which add up to 76. The second last and second first numbers are 2 and 74, which add up to 76. From this you can see that you can split the set of numbers into 37 pairs which all add up to 76, with a 38 in the middle left over. 37*76+38 = 2850
February 27th, 2007 at 1:41 pm
Great post i really like it i think giving a eg was brilliant!!! now people can understand what we have actually been doing in maths over these few days.