Question 1157997
Largest number divisible by 3 is 78
{{{ 78/3 = 26 }}}
2 sandwiches left, but 4 children left
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{{{ 75/3 = 25 }}}
5 sandwiches left -not divisible by 2
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{{{ 72/3 = 24 }}}
8 sandwiches left, but 6 children left
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{{{ 69/3 = 23 }}}
11 sandwiches left -not divisible by 2
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{{{ 66/3 = 22 }}}
14 sandwiches left, but 8 children left
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{{{ 63/3 = 21 }}}
17 sandwiches left
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{{{ 60/3 = 20 }}}
20 sandwiches left for the 10 remaining children
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20 grandchildren took 3 sandwiches each
and the 10 remaining took 2 sandwiches each