Stake attention in this memory
The video shows a person sitting on a brown carpet with striped socks on their legs. The person is holding a square wooden board with a grid on it. Each square of the grid contains a number, such as 100, 200, 500, 1000, 2000, or 5000. Some of the squares have been marked with a black symbol. The person is holding a white card with a black stripe on it and a pen in their hands. The person moves the card over the grid and marks off more squares with the pen.
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