# I feel stupid!

• Sep 4th 2008, 06:48 PM
gunner
I feel stupid!
My son is having problems with this Math pattern and a math sum

I was boasting about how good I was as a kid at these, well the old grey matter is clogged up I think

8,40,20, ? 50,250, ?
also
24+(12-1)/10=

Jim(Wondering)
• Sep 4th 2008, 06:52 PM
skeeter
8,40,20, ? 50,250, ?

I see the pattern (multiply by 5, cut in half ... repeat).

24+(12-1)/10=

24 + (11)/10 =

24 + 1.1 =

25.1
• Sep 4th 2008, 06:52 PM
ThePerfectHacker
Quote:

Originally Posted by gunner

8,40,20, ? 50,250, ?
also
24+(12-1)/10=

Mutiply by 5.
Next step you divide by 2.
• Sep 5th 2008, 02:40 AM
Simplicity
Quote:

Originally Posted by gunner
24+(12-1)/10

You have to do this in a particualar order. Remember Bodmas.

B = Brackets
O = Others (E.G. Indices)
D = Division
M = Multiplication
S = Subtraction

$24+\frac{(12-1)}{10}$

Brackets first:

$=24 + \frac{11}{10}$

As there is not other (Indices etc) operation so skip to Division.

$=24 + 1.1$

Also, there is not multiplication operation so the final stage is Addition (As this will lead to the answer hence no subtraction needed).

$=25.1$