### Brain Teasers

# Bird Brains

If 3 thistled thrushes eat 3 packs of birdseed in 3 weeks and 4 feathery finches eat 4 packs of birdseed in 4 weeks and 6 coloured cockatoos eat 6 packs of birdseed in 6 weeks then how much birdseed will feed 12 thistled thrushes, 12 feathery finches and 12 coloured cockatoos for 12 weeks?

### Hint

It must be dozens and dozens!### Answer

3 thrushes eat 3 packs in 3 weeks3 thrushes eat 12 packs in 12 weeks

12 thrushes eat 48 packs in 12 weeks.

4 finches eat 4 packs in 4 weeks

4 finches eat 12 packs in 12 weeks,

12 finches eat 36 packs in 12 weeks.

6 cockatoos eat 6 packs in 6 weeks,

6 cockatoos eat 12 packs in 12 weeks,

12 cockatoos eat 24 packs in 12 weeks

So 48+36+24 = 108 packs.

Answer: 108 packs.

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## Comments

Too easy--that is for the difficulty level. But cleverly written.

"Two Aging Mathemeticians" have the same difficulty rating, yet this one can be done in one's head.

BUT STILL--GOOD ONE! THANKS FOR THE TEASER!

-Steve

"Two Aging Mathemeticians" have the same difficulty rating, yet this one can be done in one's head.

BUT STILL--GOOD ONE! THANKS FOR THE TEASER!

-Steve

I chose this brain teaser because birds are my favourite animals and math is one of my favourite subjects. I loved this brain teaser and found that there was a lot of adding. It was very interesting and was similar to the ones we do at school but longer.

By Jacinta Nowland

By Jacinta Nowland

Cute wording but too easy.

4^2*3 + 3^2*4 + 2^2*6 = 108

4^2*3 + 3^2*4 + 2^2*6 = 108

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