Wednesday

August 20, 2014

August 20, 2014

Posted by **harsh** on Wednesday, February 13, 2013 at 9:47am.

- math -
**Reiny**, Wednesday, February 13, 2013 at 11:27amlet's look at the first few terms

2(1!) = 2

2(2!) = 4

2(3!) = 12

2(4!) = 48

2(5!) = 240

2(6!) = 1440

2(7!) = 10080

2(8!) = 80640

2(9!) = 725760

2(10!) = 7257600

2(11!) = .....3600 , since we are only concerned about the last 3 digits

2(12!) = ..... 3200

2(13!) = ... 1600

2(14!) = ...2400

2(15!) = ...36000

after that no result will contribute to the last 3 digits.

so add them up , to the end of the first 3 digits.

Unless I made a silly arithmetic error I got 626

- math -
**harsh**, Wednesday, February 13, 2013 at 12:33pmN=2^(1!)!+2^(2!)!+...+2^(1000!)!?

this is the actual series..

- math -
**hehe**, Friday, February 15, 2013 at 4:14pmstop this.

**Related Questions**

math - Posted by nicole on Monday, September 22, 2008 at 4:32pm in response to ...

math - Posted by nicole on Monday, September 22, 2008 at 4:32pm in response to ...

math - Can u please help me with this..this is my sons 6th grade work and im ...

Math - Three digits are randomly selected without replacement from 1, 9, 9 and 6...

Computer Science - public class RandomPhoneNumber { public static void main(...

MAth - The number has 6 digits, it is evenly divisible by 2,5,and 10. The value ...

Math - Mr. Digit wanted to assign a number to each student in his class. He ...

Math - I form a 3-digit number at random from the digits 1-9. What is the ...

Maths - The digits of a three digit number are in AP&their sum is 15.The number ...

math - a number rounds off to 4000.the digits in the hundreds place is twice the...