Random Puzzles 

Workings

Hint
Tops of thermometers can't be filled unless the bottoms are.

Answer
 

Workings

Hint
The first letters of the words are: C, N, D, M, S, S, Y, P, P, H, C, A, P, B.

Answers
-----rue = construe -----jar = nightjar -----dil = daffodil -----any = mahogany or epiphany -----pox = smallpox -----gth = strength -----elf = yourself -----oia = paranoia -----ige = prestige -----hog = hedgehog -----too = cockatoo -----dix = appendix -----fin = paraffin -----upt = bankrupt

Workings

Hint
Look to the skies.

Answer
NE.

From Neptune. The first two letters from the planets in sequence: MErcury, VEnus, EArth, MArs, JUpiter, SAturn, URanus, NEptune.

Workings

Hint
Fill the 9-litre container first.

Answer
Here are the contents of the containers after each stage:

A = 9 litres, B = 4 litres
A     B
9     0     fill A
5     4     fill B from A (leaving 5 litres in A)
5     0     empty B
1     4     fill B from A (leaving 1 litre in A)
1     0     empty B
0     1     fill B from A
9     1     fill A
6     4     fill B from A (only 3 more litres fit in B)
6     0     empty B

This leaves 6 litres in container A.