any one help.....so hard to solve...!!!

1. predict the result of Alternately adding and subtracting the squares of the terms in the nth row of Pascal's Triangle.

2. given the last four terms of a row of Pascal's Triangle are : 816 , 153 , 18 , 1. determine the last four terms of the next row

3. the number 23040 can be factored into prime divisors as 2x2x2x3x3x5x8x8. determine the number of even divisors of 23040

^ thats the question....can any one solve it....thnx......show ur steps and remember explain...... :) thnx very much