Random Puzzles 

Workings

Hint
This is quite a common representation of the alphabet.

Answer
L.

The last letter from hoteL, which is H in the phonetic alphabet, alphA, bravO, charliE, etc.

Workings

Hint
This is nothing to do with pets.

Answer
Goldfish.

All of the others are mammals. If you suggested Cow I will let you have half a mark!

Workings

Hint
What is the difference between each number?

Answer
14.

Add 3 to the previous term.

Workings

Hint
Find anagrams of the words in this order: PLEASE, TRANCE, LISTEN, WARNED, VEINED, BRUISE.

Answers
ANSWER.

Reasoning
The initial letters are RWASEN, which is an anagram of ANSWER.
bruise becomes rubies warned becomes wander (or warden) please becomes asleep listen becomes silent veined becomes envied (or endive) trance becomes nectar
The word DEBATE can also be made, but this requires an obscure anagram.