Local Quiz

[grumpee]

Can anyone confirm if the answer to this is 6 or am I way of track

In the playground, where trades are made freely and easily, it was well understood that a red trading card is worth four yellow ones.

I would have needed 12 yellow cards to get a sparkly pencil with a rubber on the end.
Six of those pencils would have got a toy car.

However, my friend Sam’s dog ate all his red cards and so red cards increased in value by 100% overnight.

If I was to pay with my two pencils and the rest in red cards, I now have just enough red cards to get a toy car.

How many red cards do I have?

[Cruciverbalist]

Looks good !
A car costs 6 pencils, less the 2 you have leaves a balance of 4 pencils, which cost 4 x 12 = 48 yellow cards. These would have needed 48/4 = 12 reds before pup had his feast, but now are worth just 6 of the more valuable reds.

[JJ109]

I make it 6 also
A toy car is worth 6 pencils
As you are paying for it using 2 pencils and the rest in red cards, you need the equivalent of 4 pencils in red cards
Each pencil is worth 12 yellow cards or 3 red cards at the exchange rate of 4 to 1. Therefore you would need 3 x 4 = 12 red cards initially

When they double in value you need half that = 6

[grumpee]

thanks so much for explanation