Maths Brainteasers!!! Room 11 Parents and Children

Hi all,

Here are some Maths Brain-teasers.  Exercise that brain!!!

1. Grandpa's Age:
Grandpa:
"My grandson is about as many days as my son is weeks and my grandson is as many months as I am years.  My grandson, my son and I together are 100 years.
What is my age in years?

2, The snake in the hole:
The snake slides through a long cylindrical hole in the ground at 5 cm per second.  The hole is 6.05 metres long.  The snake takes 15 seconds to enter.
What is the length in cm of the snake?

3. Monkeys and Bananas:
Suppose it takes 6 monkeys, 6 minutes to eat 6 bananas.
How many minutes does it take 4 monkeys to eat 4 bananas?
How many monkeys would it take to eat 24 bananas in 24 minutes?

Don't think the obvious.  We will go through these at the end of the week. So you have time to think!!!  Happy Brain-teasing.  Of course I got them straight away!!!

Miss K :P)