## Discussion Forum

Que. | Mala has a colouring book in which each English letter is drawn two times. She wants to paint each of these 52 prints with one of k colours, such that the colour-pairs used to colour any two letters are different. Both prints of a letter can also be coloured with the same colour. What is the minimum value of k that satisfies this requirement ? |

a. | 9 |

b. | 8 |

c. | 7 |

d. | 6 |

Answer:7 |