Jacob and Zain take pencils from a box of 21 pencils without replacing them. On Monday Jacob takes of the number of pencils that Zain takes. On Tuesday Jacob takes of the number of pencils that Zain takes. On Wednesday morning the box is empty. How many pencils does Jacob take?
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8
7
6
5
4
Select an option, then submit.
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Junior Kangaroo 2017 (2017)
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