快猫短视频

#136 Narrowing the spectrum

Marie: 鈥淲hat鈥檚 your favourite colour of the rainbow?鈥�

Lise: 鈥淭hat would be telling鈥� its name is made up only of letters that occur in the names of the other six colours of the rainbow.鈥�

Marie: 鈥淏ut there is more than one colour that rule works for!鈥�

Lise: 鈥淎h, but if you just look at the colours that fit that rule, it is the only one that can鈥檛 be made from the letters in the other members of that set!鈥�

What colour is it?

#135 You don鈥檛 know jackpot

Solution

The jackpot setting is Cherry, 7, Cherry. Playing five times means the woman spent $2.50. Since she says that the 鈥渉ouse always wins鈥�, we know she didn鈥檛 win any more than $2. We also know the new jackpot setting doesn鈥檛 end in a seven or have two or more sevens, since I didn鈥檛 win anything when I got three sevens. Every remaining jackpot setting would have won $3 or more, except Cherry, 7, Cherry, which would have only won $2.