60 - 61 Maxima and minima problems of a folded page |
April 23, 2020 - 2:15am |

62 - 63 Maxima and minima: cylinder inscribed in a cone and cone inscribed in a sphere |
April 23, 2020 - 2:15am |

64 - 65 Maxima and minima: cone inscribed in a sphere and cone circumscribed about a sphere |
April 23, 2020 - 2:15am |

66 - 68 Maxima and minima: Pyramid inscribed in a sphere and Indian tepee |
April 23, 2020 - 2:15am |

69 - 71 Shortest and most economical path of motorboat |
April 23, 2020 - 2:15am |

6th Video: Derivation of Pythagorean Theorem |
April 11, 2020 - 6:57am |