## BdMO National 2012: Primary 6

Discussion on Bangladesh Mathematical Olympiad (BdMO) National
Zzzz
Posts: 172
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### BdMO National 2012: Primary 6

Problem 6:
Consider the given diagram. There are three rectangles shown here. Their lengths are \$3,\ 4\$ and \$5\$ units respectively, widths respectively \$2,\ 3\$ and \$4\$ units. Each small grid represents a square \$1\$ unit long and \$1\$ unit wide. Use these diagrams to find out the sum of the consecutive numbers from \$1\$ to \$500\$. (If you use some direct formula for doing so, you must provide its proof)
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samiul_samin
Posts: 1007
Joined: Sat Dec 09, 2017 1:32 pm

### Re: BdMO National 2012: Primary 6

I have got a nice solution just now.It is easy.
Solution
No,need to prove any formula.It is really easy.