Hi, Can anyone help in these questions,


(1) Hanson had some one-dollar coins and some fifty-cent coins. The ratio of the number of one-dollar coins to the number of fifty-cents coins ha had was 2:5. Hanson took 140 fifty-cents coins to the bank and changed these fifty-cents coins for the same value of one-dollar coins. In the end, the number of one-dollar coins to the number of fifty-cents coins he had became 5:2. Find the value of the fifty-cent coins Hanson had at first.

(2) AB Primary School organised a 2-day Charity Funfair. Admisson tickets were sold to every visitors at a cost of $40. On the first day, 120 more children visited the funfair than adults. The number of children on the second day was 25% more than the number of children on the first day. The number of adults on the second day was 5% less than the number of adults on the first day. There were a total of 2570 people at the funfair ont he second day.
(a) Find the number of adults at the funfair on the first day.
(b) What was the total sum of money collected from the sale of the admission tickets for both days?

(3) Hotel H and Hotel B had a total of 5200 guests. After 3/4 of the guests in Hotel H and 3/5 of the guests in Hotel B checked out, Hotel B has 260 more guests than Hotel H. How many guests did Hotel H have at first?

TIA.