Melody

Rewritten cause I got in a mess.

It will be even if one or more of the numbers is even.  (2 will be a factor)

So it will only be odd if all thre are odd  and the cances of that happening is 1/8

Prob of even = 1 -1/8  = 7/8

Just like mathsProblemSolver has already said.  Thanks MPS

Whose member name?

Mine is Melody

and yours is  Ticon6

They are all prime numbers so the smallet multiple of them all is

2*3*5*7*19 = 3990

then every multiple of that will also be divisable by all the little ones.

Good spotting Catmg!  I missed it.

It will help if people always remember that a log is a power!

Now without a calculator:

1991*1993*1995*1997*1999*2001*2003*2005*2007  (only care about last 3 digits)

same as

(2000-7)(2000+7)(2000-5)(2000+5)(2000-3)(2000+3)(2000-1)(2000+1)(2000-9) mod1000

= (1000-49)(1000-25)(1000-9)(1000-1)(1000-9)  mod 1000

= (-49*-25*-9*-1*-9)  Mod1000

= -(49*25*81)   mod1000

= -(49*25*80+49*25)   mod1000

= -(49*2000+49*25)   mod1000

= -(49*25)   mod1000

= -(40*25+9*25)   mod1000

= -(9*25) mod 1000

= -225 mod 1000

= 1000-225  mod1000

= 775 mod 1000

7+7+5 = 19

Find the area of the quadrant and put it over the area of the square.