Combination
1-3-9-15 of Berend Jan van der Zwaag

1 |
Does it contain two non-4-touching dominoes? (Touching at the corners is allowed.) |

3 |
Does it fit together with two copies of another pentomino in a 3x5 rectangle? |

9 |
Is its bounding rectangle a square? |

15 |
Can two copies construct a point-symmetric decamino with a fully enclosed 1x1 hole? |

F | I | L | N | P | T | U | V | W | X | Y | Z | |

1 |
N | Y | Y | Y | N | N | Y | Y | Y | N | N | Y |

3 |
N | Y | Y | N | N | Y | N | Y | N | Y | Y | Y |

9 |
Y | N | N | N | N | Y | N | Y | Y | Y | N | Y |

15 |
Y | N | Y | Y | N | Y | N | N | N | N | Y | Y |

Solution 1 |
Solution 3 |

Solution 9 |
Solution 15 |