!show your working!

• 1. Jimmy earns £5 per week doing a paper-round in 1998. If he gets a 10% payrise in 1999, how much does he earn per week, and how much altogether in 1999? For 2000, he has fewer papers to deliver, so he gets a 10% pay cut; what is his new weekly pay?
• 2. A family spends £400 each year on a holiday. £50 of this is travelling costs, £80 is spending money and the rest is accommodation. If the accommodation costs rise by 10% next year what will their holiday cost altogether?
• 3. Samantha has a part-time job which pays £24 per week. If she saves 25% in the Building Society and spends £1.20 a week on drinks after sports, what does she have left for shopping? What percentage of her total pay is this?
• 4. Two brothers, Joe and Jack, have part-time jobs. Joe earns £18 every Saturday, Jack has a paper round, Monday-Friday in term-time only (36 weeks per year) and earns £5 per day. Who earns most in one year?
• 5. Suppose a man has to earn more than £1600 per year before having to pay income tax. Calculate his maximum weekly pay if he doesn't pay any tax.
• 6. I set off from San Diego at 18.30 San Diego time. The 13-hour flight finished at Heathrow at what time (San Diego time)? If UK time is 8 hours later than San Diego time, what time did I land at Heathrow? My journey to Dorset took 3 hours, what time did I get home?
• 7. Which is colder, 5.5 degrees less than 2.5 degrees, or 7 degrees less than 3.2 degrees?
• 8. Frozen fish must be kept below -25 degrees C. frozen fruit below -15 degrees C. Jenny's freezer is at -22 degrees C, Fred's is at -11 degrees C. Which probably lasts longer, Fred's fruit or Jenny's fish?
• 9. Simplify these where possible:
  (i) 5p+3q+2p+p-4q
  (ii) x+y-5z+2y+y-8z+2x
  (iii) r+3s-r-6r-s
  (iv) 5q-3r+16s
  (v) ab+6ba-3a+14ba
  (vi) pq+3rs+sr+20qp-r²
  (vii) x+x²-6+4x+3+4x²
  (viii) i²+2ji+j²-ij-ij+ji-i²
• 10. expand then simplify the expression: (x+2)(x-2).

Do drop a line to Caveman Colin for friendly hints/tips in answering these questions. If you send in some correct answers he might even send you a list of his favourite Stone-Age web sites!