Question P6 Constant total
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Alina, Betty and Cindy shared some chocolates. Alina had of the total, Betty had 25% as many as Cindy, and Cindy gave 104 chocolates to the other two so that all three had equal amounts. Find the original total.
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Money moves between two people, so their total never changes.
In this one. When the unchanged total must be shared equally among 3 people, scale the starting ratio so its total number of units is divisible by 3.
One person gives, sells or loses an amount to the other, and nobody outside the two people gains or loses anything.
Children draw different totals before and after, or forget that moving an amount from one person to the other changes the gap between them by twice that amount.
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