Question
A book shop sold 1 marker for $4. For every 2 markers sold, an additional marker would be given free. If Mrs Chen spent $16 on the markers, how many markers did she receive in total?
4 m

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A book shop sold 1 marker for $4. For every 2 markers sold, an additional marker would be given free. If Mrs Chen spent $16 on the markers, how many markers did she receive in total?