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PostPosted: Sat Feb 16, 2013 5:35 pm 
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https://www.dropbox.com/s/agymm3y2uy02o ... 5%2010.jpg

Answer doesn't seem to match to my little brain.


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PostPosted: Sat Feb 16, 2013 5:46 pm 
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Location: Warwickshire
Correct answer is C


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PostPosted: Sat Feb 16, 2013 5:50 pm 
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Thanks, how it works.


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PostPosted: Sat Feb 16, 2013 5:55 pm 
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DS said that substitution works. He used N=4 and only one of those responses worked.


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PostPosted: Sat Feb 16, 2013 6:02 pm 
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You have to do this step by step.

N is first divided by 4. That gives you N/4.

Then you add 1. That gives you N/4 + 1.

Then you have to multiply the whole lot by 2. That gives you 2 x (N/4 +1), which is 2N/4 + 2, which is N/2 + 2.

Think of it this way - 1/4 x 2 is 2/4, which is 1/2.


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PostPosted: Sat Feb 16, 2013 7:06 pm 
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Sometimes starts from left to right regardless of add or multiply but sometimes it is in hierarchal order. Which one we can teach. At least brackets will not confuse them at this stage.


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PostPosted: Sun Mar 03, 2013 10:46 pm 
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Eh? Think it follows BODMAS always. What did you mean by "which to teach?"


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