Medium Puzzles 

Workings

Hint
There are at least 13 in total.

Answer
There are at least 12 to choose from:

Ape, ewe, cat, kid, doe, fox, ox, kea, nag, ram, pig, cow.

Workings

Hint
Five of the missing first letters are: F, P, T, C, B.

Answers
--pay = repay --lad = salad --ior = prior --eue = queue --rva = larva --day = today --voc = havoc --yss = abyss --gun = begun --pty = empty --til = until --cay = decay --uke = fluke --uze = gauze --noe = canoe

Workings

Hint
Each number in the poem indicates which letter of the answer is being used.

Answer
Wednesday.

Reasoning
Each number in the poem indicates which letter of the answer is being used.
6523 = seed
 689 = say
 751 = dew
 421 = new

Therefore, '751 rhymes with you' is read as 'dew rhymes with you'.

Workings

Hint
Snakes don't have legs.

Answer
6 snakes, along with 7 people and 14 lizards.

Reasoning
We know that for each person (2 legs) there were 2 lizards (4 legs each).

Which means for every person, we can count a total of 10 legs.

Snakes don't have legs, so the total of 70 legs must have been 7 people (and 14 lizards).

This is a total of 21 heads, so the remaining 6 heads were all snakes.

Double-Checking
7 people gives 7 heads and 14 feet.

14 lizards gives 14 heads and 56 feet.

6 snakes gives 6 heads and 0 feet.

For a total of 6 + 7 + 14 = 27 heads, and 0 + 14 + 56 = 70 feet.