Abacus
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The upper part of an abacus consists of one bead each that has the value of 'five'. The lower part of an abacus consists of four beads and each of them has value 'one'. All the beads in one grid together add up to the value 'nine'.
How many total beads are there. Are the beads only red or blue?
2676
300 beads
None, because there are only ten red beads!