у первого мудреца парная сумма.
решение: если он точно знает, что сумма второго мудреца парная, то у него парная и в коробке парная. если бы у первого была бы непарная, то у второго была бы или парная, или не парная(тоже и в коробке). точно знать какая суммау второго можно знать.только в этом случае: 1 2 3
1-ый мудрец (п) (н) (н)
2-ой мудрец (п) (п) (н)
коробка (п) (н) (п)
12. do you know where your brother is? - oh, i met him an hour ago, at richmond brigde.
13. do you know where your brother was last night? - he spent the evening with his friends.
14. where is dorothy? - she is outside. she is playing with her baby sister.
15. what did dorothy do last night? - she studied french and talked to her friends on the phone. => did she study hard? - yes, of course, she did.
16. john is working in the garden at the moment. he likes doing this although he hated it when he was younger.
17. would you like to spend the weekend with us? - sorry, i won't be able.