Lana Syarif
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African marigolds, hand-coloured copperplate engraving published by Michael Valentini (1657-1729)

Michael Valentini - Viridarium Reformatum, seu Regnum Vegetabile: Krauter Buch (Newly Revised Garden of the Plant Kingdom: Herb Book), Antique botanical illustration.

Here’s a problem that’s part of a math exam in India. You need to select three…

Here’s a problem that’s part of a math exam in India. You need to select three… It is not possible because three odd numbers added will always equal an odd and thirty is an even number.