Hi,

Can you give me some help with my yr 10 problem solving?

i just need help with 2 questions

the first one is "a gambler bets half of all he owns on the toss of a coin. pleased is he when he wins, that he bets another 19 times, always betting half of the total amount he has. Happily, he says 'i won as often as i lost. So i presume i've come out even.' is he correct" i have to use algebra to obtain my result

so far i have been able to figure out the when he wins the equation is

x + x/2 (x being the total amount he has)

and when he loses the equation is

x/2

but that is all i have been able to figure out.

the next one is "Each person in a room at a new year's eve party kissed every other person in the room once. If by the end of the night ther had been 190 kisses, how many people were in the room" for this i must "by first finding a rule for the number of kisses ther would be for n people, use algebra to obtain your result"

i have hit a brick wall with this and cant think of anything what so ever

so any help would be greatlt appreciated

thanks

Zac