Math Is Fun Forum

It works very well! Thanks a million!

I wonder how mathsy reached this number so quickly!893380022607743740081787109376.
I knew 43740081787109376,
Just tell me whether you exhausted all the other numbers,
that is, we know 1787109376^2 ends in 1787109376.
But, 2787109376^2 should not end in 2787109376.
mathsy, would you clarify this point?

Perfectly okay, Administrator!

The green, splendid paper plane flew slowly underneath the roof that was actually supported by columns made...

Choose arbitrary a and b, and let t = a + b. Then
a + b = t
(a + b)(a - b) = t(a - b)
a^2 - b^2 = ta - tb
a^2 - ta = b^2 - tb
a^2 - ta + (t^2)/4 = b^2 - tb + (t^2)/4
(a - t/2)^2 = (b - t/2)^2
a - t/2 = b - t/2
a = b

This fallacy arises as a result of taking the square-root of both sides of an equation.

Spiderman's contribution is 8 pounds.
Therefore, it is inferred each person contributes 8 pounds.
[keep em guessing, ganesh!]

My favorite book is
'The Man Who Loved Only numbers'
by Paul Hoffman

Algebra is a very useful tool in mathematics.
There are some basic rules you got to remember,
and if you do, you are good at it!
Like if you got to solve this problem,
knowledge of elementary algebra really helps!

Problem :- Ten years ago, my dad was four times my age.
Ten years later, he'd be double my age.
By how many years is he elder to me?

Its always difficult to find the factors, given the simplest form.
a^3 - b^3 is (a-b)(a^2 + ab + b^2).
If one of the factors is known, it becomes a bit easier.
For lower degrees, by remembering some formulae, it can be done easily.
Like a^2 - b^2 = (a+b) x (a-b),
(a^3 + b^3) = (a+b) x (a^2 - ab + b^2) etc.
When you are aksed to prove that the LHS is equal to the RHS,
it is always better to start with lower degrees.

First, we'd have to convert  the trunk into two dimensions.....
Now, we get a right angled triangle for one twist,
and one side of the triangle is 32 inches, height is 60 inches,
the hypotenuse is square root of
32^2 + 60^2
that is square root of
1024+3600,
eight times this value is the lenght of the creeper;
AND
Thank you, Mr.Administrator, for liking my avatar .

The Dictionary is, indeed, fantastic!

That's great news for London and the UK.