Question 1186766
A group of 30 children shared some stamps among themselves. 1/3 of
the children....<pre> 
That's 1/3 of 30 children, which is 10 children
</pre>received 5 stamps each....<pre>
So those 10 children altogether received 10x5=50 stamps.
</pre>3/5 of them...<pre>
That's 3/5 of 30 children, which is 18 children
</pre>received 10 stamps each...<pre>
So those 18 children altogether received 18x10=180 stamps.
</pre>and the rest...<pre>
Let's see what fraction is the rest. We've already talked about 1/3 of them 
plus 3/5 of them:

{{{1/3+3/5}}}

The least common denominator is 15.

{{{(1/3)(5/5)+(3/5)(3/3)}}}
{{{5/15+9/15}}}
{{{14/15}}}

So we've already talked about 14/15ths, so the rest is 1/15th:

That's 1/15 of 30 children, which is 2 children
</pre>received 15 stamps each...<pre>

So those 2 children together received 2x15=30 stamps.
</pre>How many stamps were there altogether?<pre>

So we add them up.   50 + 180 + 30 = 260 stamps.

Edwin</pre>