The Motor Forum

woof woof · Posted: Wed Jul 15, 2009 3:11 pm Post subject: 20p

They had a question on radio 5...

How many different ways can you give someone 20p?

And, for the smutty minded...they mean how many different combinations of coins can you use to make up 20p...

1 x 20p.
2 x 10p.
1 x 10p + 2 x 5p...etc...

Any idea?
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woof woof's defence lawyer claimed that "Booze played no part in his typo's."

Confucius says "all reckless speeding is caused by accidents."

Giant · Posted: Wed Jul 15, 2009 3:13 pm Post subject: Re: 20p

Humphrey The Pug · Posted: Wed Jul 15, 2009 3:13 pm Post subject:

This was on Radio One a few days back and I think the answer was 40 or 41.
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Mummy, Daddy, Sissy, Sassy Baby.

woof woof · Posted: Wed Jul 15, 2009 3:34 pm Post subject:

I've just got it to 40.
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woof woof's defence lawyer claimed that "Booze played no part in his typo's."

Confucius says "all reckless speeding is caused by accidents."

Humphrey The Pug · Posted: Wed Jul 15, 2009 3:39 pm Post subject:

I was bored!!

1. 20p
2. 10p+10p
3. 10p+5p+5p
4. 10p+5p+2p+2p+1p
5. 10p+5p+2p+1p+1p+1p
6. 10p+5p+1p+1p+1p+1p+1p
7. 10p+2p+2p+2p+2p+2p
8. 10p+2p+1p+1p+1p+1p+1p+1p+1p+1p
9. 10p+2p+2p+1p+1p+1p+1p+1p+1p
10. 10p+2p+2p+2p+1p+1p+1p+1p
11. 10p+2p+2p+2p+2p+1p+1p
12. 10p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
13. 5p+5p+5p+5p
14. 5p+5p+5p+2p+2p+1p
15. 5p+5p+5p+2p+1p+1p+1p
16. 5p+5p+5p+1p+1p+1p+1p+1p
17. 5p+5p+2p+2p+2p+2p+2p
18. 5p+5p+2p+2p+2p+2p+1p+1p
19. 5p+5p+2p+2p+2p+1p+1p+1p+1p
20. 5p+5p+2p+2p+1p+1p+1p+1p+1p+1p
21. 5p+5p+2p+1p+1p+1p+1p+1p+1p+1p+1p
22. 5p+5p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
23. 5p+2p+2p+2p+2p+2p+2p+2p+1p
24. 5p+2p+2p+2p+2p+2p+2p+1p+1p+1p
25. 5p+2p+2p+2p+2p+2p+1p+1p+1p+1p+1p
26. 5p+2p+2p+2p+2p+1p+1p+1p+1p+1p+1p+1p
27. 5p+2p+2p+2p+1p+1p+1p+1p+1p+1p+1p+1p+1p
28. 5p+2p+2p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
29. 5p+2p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
30. 5p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
31. 2p+2p+2p+2p+2p+2p+2p+2p+2p+2p
32. 2p+2p+2p+2p+2p+2p+2p+2p+2p+1p+1p
33. 2p+2p+2p+2p+2p+2p+2p+2p+1p+1p+1p+1p
34. 2p+2p+2p+2p+2p+2p+2p+1p+1p+1p+1p+1p+1p
35. 2p+2p+2p+2p+2p+2p+1p+1p+1p+1p+1p+1p+1p+1p
36. 2p+2p+2p+2p+2p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
37. 2p+2p+2p+2p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
38. 2p+2p+2p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
39. 2p+2p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
40. 2p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
41. 1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p+1p
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Mummy, Daddy, Sissy, Sassy Baby.

woof woof · Posted: Wed Jul 15, 2009 3:59 pm Post subject:

Well done.

I miss counted

It should be 41, I think, this is how I got there...

1. 20p
2. 10p x 2.
3. 10p x 1 + 5p x 2.
4. 10p x 1 + 5p x 1 + 2p x 2 + 1p x 1.
5. 10p x 1 + 5p x 1 + 2p x 1 + 1p x 3.
6. 10p x 1 + 5p x 1 + 1p x 5.
7. 10p x 1 + 2p x 5.
8. 10p x 1 + 2p x 4 + 1p x 2.
9. 10p x 1 + 2p x 3 + 1p x 4.
10. 10p x 1 + 2p x 2 + 1p x 6.
11. 10p x 1 + 2p x 1 + 1p x 8.
12. 10p x 1 + 1p x 10.
13. 5p x 4.
14. 5p x 3 + 2p x 2 + 1p x 1.
15. 5p x 3 + 2p x 1 + 1p x 3.
16. 5p x 3 + 1p x 5.
17. 5p x 2 + 2p x 5.
18. 5p x 2 + 2p x 4 + 1p x 2.
19. 5p x 2 + 2p x 3 + 1p x 4.
20. 5p x 2 + 2p x 2 + 1p x 6.
21. 5p x 2 + 2p x 1 + 1p x 8.
22. 5p x 1 + 2p x 7 + 1p x 1.
23. 5p x 1 + 2p x 6 + 1p x 3.
24. 5p x 1 + 2p x 5 + 1p x 5.
25. 5p x 1 + 2p x 4 + 1p x 7.
26. 5p x 1 + 2p x 3 + 1p x 9.
27. 5p x 1 + 2p x 2 + 1p x 11.
28. 5p x 1 + 2p x 1 + 1p x 13.
29. 5p x 1 + 1p x 15.
30. 5p x 1 + 1p x 10.
31. 2p x 10.
32. 2p x 9 + 1p x 2.
33. 2p x 8 + 1p x 4.
34. 2p x 7 + 1p x 6.
35. 2p x 6 + 1p x 8.
36. 2p x 5 + 1p x 10.
37. 2p x 4 + 1p x 12.
38. 2p x 3 + 1p x 14.
39. 2p x 2 + 1p x 16.
40. 2p x 1 + 1p x 18.
41. 1p x 20.

Edit - made a typo, but I still think it's 41.
_________________
woof woof's defence lawyer claimed that "Booze played no part in his typo's."

Confucius says "all reckless speeding is caused by accidents."

SpecB · Posted: Wed Jul 15, 2009 4:02 pm Post subject:

Quiet at work is it?

_________________

Mark

woof woof · Posted: Wed Jul 15, 2009 4:02 pm Post subject:

I've been auditing...just typing results up so not exactly quiet, just boring.
_________________
woof woof's defence lawyer claimed that "Booze played no part in his typo's."

Confucius says "all reckless speeding is caused by accidents."

Bob Sacramento · Posted: Wed Jul 15, 2009 4:09 pm Post subject:

For some reason I thought it was a trick question and made it 1600 different combos.

Don't ask me why.

EDIT: I was well out then....
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Keep Calm & Carry On.

DetmoldDick · Posted: Wed Jul 15, 2009 4:42 pm Post subject:

What about if you give a 50p and get 30p back?
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A thing of beauty is a joy forever; Keats.

woof woof · Posted: Wed Jul 15, 2009 4:43 pm Post subject:

You'll be working it out all day.
_________________
woof woof's defence lawyer claimed that "Booze played no part in his typo's."

Confucius says "all reckless speeding is caused by accidents."