Random Puzzles 

Workings

Hint
Tomorrow's yesterday is always today.

Answer
Today.

Reasoning
Tomorrow's yesterday is always today.

And yesterday's tomorrow is also always today.

Workings

Hint
Work out the total number of legs.

Answer
23 children (46 legs).

With 230 ants (1380 legs), 3 puppies (12 legs), and 1 teacher (2 legs).

If we call the number of puppies P, then there were (P + 20) children and 10 x (P + 20) ants, and a single teacher. If we now count the legs, we get:
Puppies:
 P x 4 =  4P

Children:
 (P + 20) x 2 =  2P + 40

Ants:
 10 x (P + 20) x 6 = 60P + 1200

Teacher: 2

A total of 66P + 1242

Giving:

 66P + 1242 = 1440

 66P        = 198

   P        = 3

So there were 3 puppies, hence 23 children.

Workings

Hint
The first word begins with the letter M.

Answer
Many hands make light work.

Workings

Hints
The first letters of the animals are: E, C, K, G, R, C, T, H, P, R.

Answers
elephant crocodile kangaroo giraffe rhinoceros chimpanzee tortoise hippopotamus porcupine rattlesnake