Hint: A knight moves in the shape of an L, two squares one way, one square the other.

Answer:

Puzzle 417

Below are 10 skittles in an upside-down triangle, can you move the skittles around such that the triangle is the correct way up? You can only move 3 skittles!

[Ref: ZHCF]

Hint: This doesn't involve turning the picture upside down.

Answer: Only three skittles have to move, we have labelled them 1, 2 and 3. You can see their starting positions first and then where they end up in the triangle.

Puzzle 418

My first is in horse but not in pony.
My second is in coyote but not in jackal.
My third is in shrew and also in vole.
My fourth is in panda but not in bear.
My last is in baboon but not in monkey.
What am I?

In a day there are 60 x 60 x 24 seconds = 86,400 seconds.

In 10 years there are 10 x 365 x 24 hours = 87,600 hours, which even without the leap years is already the larger number.

Puzzle 420

Using the BrainTracker grid below, how many words can you find? Each word must contain the central A and no letter can be used twice. The letters do not have to be connected. Proper nouns are not allowed, however, plurals are. Can you find the nine letter word?