Please do NOT post your answers, but do say if you think you have solved the puzzles and how long it took. Solution on Monday.

John weights much more than 20 stone.  He goes to the shops to buy some scales, but the scales there only go up to 20 stone.  However, he comes up with a way of accurately weighing himself every day using the scales.  What was his plan?

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1. Simon Taylor says:

Same here, straight away.

2. Traci says:

I think this one is very very easy. Or I’m missing something. I suspect the latter is more likely.

3. SofARMaths says:

A few second thoughts.

4. bigdoggy says:

Immediately, but I’m wondering if there’s another solution…

5. John Green says:

He ‘weights’ much more than…?
Is this part of the puzzle?

About ten seconds, but it would be easier to buy a set is scales which cover John’s weight range.

7. Ajit Athle says:

Also he goes to “the shops” — perhaps one shop is allowed to sell only one unit to a person!

8. Walter says:

How much is “much more”? Up to 40 stones would be easy. Up to 80 kind of quirky. Above 80 I don’t have a solution.

1. Julia says:

I think I’ve got the same solution as you. Though I think it would actually be quite a bit trickier in practice than it appears in theory.

Alternatively, there’s always the method my brother used to weigh his luggage when he didn’t have any scales at all.

9. Martha says:

LOSE SOME BLOODY WEIGHT!!!

1. Tim says:

Nice one with the politeness and respect there, Eddie.

2. Dave says:

Why not ask for a refund?

Oh wait.

10. Tibi says:

To spice things up: John weighs around 100 stones, and can only buy one scale.

1. ivan says:

Has he got a swimming pool?

2. Walter says:

Has he got a Saturn 5 rocket?

11. Yep, too easy, Richard! Solved it as soon as I read it.

12. Well, I think I have it, but it seems too easy to really be that easy.

13. LazyT says:

Several solutions leap to mind but I guess he’s not planning to disembowel himself or waste the dwindling volumes of helium available so I think he’s going to pick the easy method.

14. mittfh says:

As long as he doesn’t weigh more than 40 stone (at which point he’d probably have problems getting to the shops, so would have to order the scales online!), I have a potential solution which is easy to implement.

15. Timdifano says:

I have two solutions, one will work even if he is well over 40 stones, but I guess this is unlikely as he would never have made it to the shops in the first place.

16. Berhard says:

found three solutions up to now, … first in few seconds the ohters a few seconds later…

17. -M- says:

Found three solutions. Not sure I’ve got “the” answer.

18. What sort of a stupid question is this? Is the answer supposed to be something other that the bleeping obvious?

19. I predict a diet.

1. Anonolom says:

I predict cardiovascular disease and diabetes.

2. SpaceDog says:

:: golf clap ::

3. Anomalom says:

Golf clap. Haven’t heard of that disease before. Do you get that by swinging your wedge about in a bunker?

20. Zbird says:

Even I found it easy. Say my answer Monday and check with you brainy ones

21. I’ve got a few answers, depending on just how dedicated John is.

22. Anonymous says:

No problem. Just a few more supplies to get–a good friend with a strong stomach and an open calendar and some heavy-duty trash bags.

23. Anonymous says:

Over here weight is measured in “pounds.” (And to be even MORE convoluted, it’s abbreviated as Lbs.) I guess we’re worth our weight in British currency.

1. Yeah, well, if you stupid Americans could just learn to use the metric system, you’d be measuring in stone just like the rest of the world. Wait a minute . . .

2. Internet Outrage Counselor says:

If he weighs much “more than 20 stone” he probably IS American.

3. Anonymous says:

Over where?

24. Mervulon says:

Beyond the stones, I’m thrown by all this plural ‘shops’ and ‘scales’ litany of Brittany. I’m going to drive to the store, take the elevator up, buy a scale, and bring it home in the trunk of my car. (If they have one that can handle my stones, that is!) 😉

1. LOL! My sentiments exactly! I’m still wondering how much a stone is. Must go google it to find out just how fat this dude is!

25. mightyhero says:

I know how he can weigh himself.

26. Louise says:

My first thought was he could tie helium balloons to his arms… O dear…

27. Nick 666 says:

Piece of cake-chops his legs off and then ways every bit individually lol

28. Anonymous says:

I got it in a moment.

29. Dharmaruci says:

there are many possible answers to this.

one is the use the archimedes principle. weigh himself in a bath of water and then subtract the weight of the water. this is easier in metric as one kilo is the same as a liter.

or he could do the obvious and weigh himself twice.

1. The other Matt says:

2. The other Matt says:

Haha, this is not so exactly anyway !

30. The other Matt says:

i definitely got two answers ! 3secs and 3mins

31. Anonymous says: