WORKSHEET - REVISION OR NOT

SO FAR Q1,2,4,5,6,7 ARE DONE.
cAN ANYONE TRY THEM AND SEND ME A SOLUTION FOR Q3 or Q8-12, thx :-)

Thanks Juliette :-)

Q5

                                           Thanks Juliette :-)
REMARK: A BETTER DENOMINATOR TO USE IS JUST $(n+1)!$
but it doesn't really matter provided your skills in algebra are up to it!

Thanks Juliette :-)

REMARK: A BETTER DENOMINATOR TO USE IS JUST $5!(P-1)!$ 

but it doesn't really matter provided your skills in algebra are up to it!

QUESTION 7

Thanks Holly et al :-)