puneetluthra198508 wrote:what's the best way to calculate the solution for multiplication of first n numbers..
ex ... p(100) -> 1*2*3*4___99*100..
Hi puneetluthra198508!
Anurag@Gurome is exactly right in that you're actually looking at 100!. But to make sure it is clear for your question, there is NO way to calculate this actual value without a heavy duty calculator. You will never be asked to do so on the test as the number has 157 significant digits (it equals approximately 9.3 x 10^157.
The test might ask you how many trailing 0s it has (the number of zeros between the decimal and the first non-zero digit - ie, the number 97000 has 3 trailing 0s).
I'll let you puzzle over how to figure that one out and you can yell back for help if you get stuck!
Hope this helps!
Whit
Whitney Garner
GMAT/GRE/EA Instructor & Anxiety/Accommodations Coach
www.whitneygarner.com
Contributor to Beat The GMAT!
Math is a lot like love - a simple idea that can easily get complicated
