Any question answered...

Which tool? The ratchet or the spanner?

Spanner is obvious, ratchet is a Topeak.

I use Wera as my ratchet and make sure the bits in the holder matches what I need on my bike and a few other common bits for other not myself repairs.

https://www.sjscycles.co.uk/tools/park-tool-cbw1-caliper-brake-wrench-open-end-810mm/

If you’re staying and you like the idea of opening the space out, do it. If in the distant future when you decide to sell there is a massive drop in value/sell ability then put it back in. Fashion and tastes change so just do what you want for you.

The spanner.
I'm trying to put together a compact tool set for touring that also covers all eventualities.
There's some 8mm and 10mm nuts on my mudguards and racks.

@hugo7 that's pretty close, thanks.

I can't really think of a 9mm nut, but I did really like how they incorporated three sizes.

I'm not sure I really got the quick link thing, as surely you just push the front plate along with any old hard thing?

FYI Lezyne do good and light multitools.

Has anyone got any recommendations for a good osteopath in Central/North London? Cheers

No. Mine was shit and mainly spent the sesh bitching about his ex wife.

However, I'll see if my folks guy is still alive.

^ not dead but retired.

3 people may or may not send me a Xmas card.

1. What is the search term/field(?) of maths I need to be Googling?
   
2. What's the formula for checking my possible combinations are correct?
   
   

Sort of like:

• Alfred sends letter, Bob doesn't, Charlie doesn't
  
• Alfred sends letter, Bob sends letter, Charlie doesn't
  
• Alfred sends letter, Bob sends letter, Charlie sends letter
  Etc.
  
  
  

Yeah, I drive her car a lot and tbh she needs to be insured on mine just in case.
Will probably need to get all the details ready and have a go at it. Can you request all the details you gave to the insurance? I know my wife had a claim a few years ago but trying to get the specific information out of her is nigh on impossible, so it would make life a lot easier if I could just get the insurance company to give me that info back.

combinations and permutations pretty much covers it
If you wanted to check how many combinations there were when, say, 3 from 10 sent you a card
then from a 'n, choose r' type calc then n=10, r=3 and the number of combinations would be 120
https://www.calculatorsoup.com/calculators/discretemathematics/combinations.php

in your example, if you just have two choices then you'd probably most often find it illustrated as a binary tree 3 levels deep

Cheers.

Yes, it's just 3 options each yes or no.

Ie what are all the combinations of those three either sending or not sending me a card.

I found something referencing the n and r, but didn't understand how to apply it. n = names of people sending me cards, right?
But then how does r fit in?

When I write them in a table I get 18 entries, but I'd like to verify that, and also have more knowledge for the future if I come across a bigger number of options.

If you lose your trade in receipt at CEX are you shit outta luck?

I took some ps3 pads in, got £20. They gave me cash for a game (1.50) but not the pads and said something about an hour.
I was having a bit of a sweaty anxiety attack at the time (huge winter coat, took longer than I wanted etc etc etc) and Im not sure if the monet arrives in an hour or I go back in an hour after testing.
Its been abour 2 hours. I cant find the receipt for the pads just the game ffs

edit: got everything wrong, double-counted, and agree with duncs below that it's choices (2) to the power of people (3), so 8.

https://www.mathsisfun.com/combinatorics/combinations-permutations-calculator.html

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the combinations formula would be for a slightly different question actually - out of 10 (n) people, how many ways are there to select 3 (r) people.

for your specific one, 3 people with a yes no choice then it'll be 8 possible combinations: 2^3

the way to build up those would be
assume 1 person

2 possibilities

doesn't send a card - let's call that 0
sends a card - call that 1

so 1, 0

then for the 2nd person, you do the same choice, but append the list of choices you had before
e.g.
00, 01, 10, 11

then for the 3rd, same again - take the 4 from the list above, and duplicate, but with 0 before one set and 1 before the next
000, 001, 010, 011, 100, 101, 110, 111

and so on. each time the possible choices double
4 people: 16 possibilities
5 people, 32 possibilities
6: 64

It's often on the document they send you when you first sign up for the insurance (the Schedule of Insurance I think it's called)

Cheers all.

Edit also realised I was miss understanding the combinations and reading off the total entries(?) produced. As well as ignoring no, no, no as it wasn't needed for the ultimate practical application.

Can you get parcels you've "sent" back from the post office if they are just sitting there gathering dust? Or are they no longer yours?

Can you get parcels you've "sent" back from the post office

No, that's interfering with the mail
Once the post office has it, the mail belongs to the addressee until Royal Mail has used its best endeavours to deliver it, after which they may deliver it to the sender if the sender's details are marked on the mail item.

Thank you!

I've got one if you want that exact tool.

Yours if you want it.

Oh thanks. I'll pm you.

Was in east Dulwich yesterday and saw the scene of an accident- looked like a driver had lost control and smashed into a line of parked bikes (including an urban arrow cargo bike) and a phone box. I took a few photos including the licence plate of the car that I think was involved. What should I do with this? Worth reporting? Who to?

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Yes. To the police.

Stick a note on the bikes with your number and the reg number?