[Archive!] Pure mathematics, physics, chemistry, etc.: brain-training problems not related to trade in any way - page 514

 

Race.

In order for it to work, you need two adjacent dice to have a sum of 7.

Only (D) fits.

 
TheXpert:

Race.

In order for it to work, you need two adjacent dice to have a sum of 7.

Only (D) fits.

how did you decide ?
 

For (A)

For (*) and (**) there is only connection via (***) and (****) as (*) and (**) are in front and (*****) and (******) in back

So (**) and (***) can only be linked through (***) and (****) too

(***) and (****) do not fit, as (***) at the bottom bone at the front (****) at the back.

That's it, there are no options.

 
TheXpert:

For (A)

For (*) and (**) there is only connection via (***) and (****) as (*) and (**) are in front and (*****) and (******) in back

So (**) and (***) can only be linked through (***) and (****) too

(***) and (****) do not fit, as (***) at the bottom bone at the front (****) at the back.

That's it, there are no options.


Yes, it's easy, thank you. All the previous tasks in the assignment were with arithmetic operations and here we got hung up ))
 

No, it should be posted here after all.


 
50% kinda.
 

No prompting!

 
Can I rephrase the question? I think I may have jumped the gun.
 

Well, yes, or repeat the pattern, it's not visible :(

 

There are two white, one blue and one red balloons.

Petya has puzzled a colour.

Vasya tries to guess the given colour at random. What is the probability that Vasya will guess?