SOLUTION: Bob had some marbles. He divided them equally into two piles and gave one pile to Jane. Jane divided her pile equally into two piles and gave one pile to Georgio. Georgio had 4 mar

Question 832153: Bob had some marbles. He divided them equally into two piles and gave one pile to Jane. Jane divided her pile equally into two piles and gave one pile to Georgio. Georgio had 4 marbles. How many marbles did Bob have to begin with?
Which of the following problem-solving strategies would be most appropriate to use to solve this problem?
A) work backwards
B) Make comparative lists
C) set up an equation
D) use a manipulative
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
For me, the easiest way is to work backward. YMMV.
.
Georgio had 4. That was half of Jane's, so Jane had 8. Jane's was half of Bob's, so Bob had 16.

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