You meet a couple, Dan and Daisy. Dan asks Daisy “Are you the kind who could ask me whether I am a Crick?"
What can be deduced about Dan and Daisy?
You meet an alien called Bobby. He asks you “Am I the kind who could ask whether the wizard is the kind who could ask whether I am the wizard?"
Do you now know for sure who the wizard is?
You then meet a strange alien who asks you “Am I the kind who could ask you the question I am now asking?"
What can be said about her?
You meet three friends: Alex, Bernie and Carol. Alex asked Bernie “Are you the kind who could ask Carol whether she is the kind who could ask you whether you two are of different kinds?".
You might realise that it is only possible to deduce the kind of one of the three friends. Which one and are they a Crick or a Goop?
You meet an alien called Charlie. He asks you “Are the wizard and I the same kind?"
Who is the wizard?
a) Mr Smith has seven children. He wants to send three of them to run some errands on a Saturday. We will send the first child at 1pm, the second child at 2pm and the third one at 4 pm. In how many ways can he choose them?
b) The children decided to actually go run all the errands together at 1pm, instead of going separately. Knowing this, in how many ways can Mr Smith select three of them to run the errands?
Katie is making a bouquet. She has
We have
David has
Katie is making a bouquet again. She has