Hi can anyone help? thank you

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Hi KateM

Let me try to help you

This question deals with the concept we call * constant difference*. Constant difference happens when usually 2 parties (or more) give away or receive the same quantity of items or objects. Constant difference also happens in age, where the age difference remains the same between 2 (or more) parties.

This question is dealing with *constant difference*, as we can see that both of them have spent the same amount of money buying the same item. Hence the difference in amount of money they have *before* and *after* will be the same.

Do note that they had a difference of $70 – $42 = $28 at first. They will still have a difference of $28 in the end.

Their ratio at the end is 5 : 1. This means that the difference of 4 units would represent the difference in money that they have, which is $28.

Since 4 units represents $28, 1 unit would represent $7.

Ivan had 1 unit of money left in the end, that would also mean he has $7 left.

Hope this helps!

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Thank you very much for the prompt reply!

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