How many obsidian blocks are required to build a nether portal in Minecraft?
Explanation
In Minecraft, building a Nether portal requires a total of 10 obsidian blocks. This is because a Nether portal is built in a rectangular shape, with a height of two blocks and a width of four blocks. Each side of the portal frame requires three obsidian blocks, and the top and bottom blocks are also made of obsidian. Therefore, adding up the numbers for each side and the top and bottom blocks results in a total of 10 obsidian blocks necessary to construct a Nether portal in Minecraft.