12. Buying an album. To buy the album, Masha was short of 2 kopecks, Kolya was short of 34 kopecks, and Fedia was short of 35 kopecks. When they combined their money, it still wasn't enough to buy the album. How much does the album cost?
12.Since Kolya has one kopek more than Fyodor, he has at least 1 kopek, and 1 kopek is added to Masha's money. But Masha was short of money for the album, so she was given less than 2 kopeks, which means Fyodor has no money at all and is short of the full cost of the album. Answer: the album costs 35 kopeks.