Answer
When I pressed TARE on the scales, it brought a TEAR to my eye, as a piece of metal stuck in my finger. I didn't RATE this as a good experience.
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Puzzle 19
Exactly how many minutes is it before eight o'clock if …
… 40 minutes ago, it was three times as many minutes past four o'clock?
Reasoning
If we call the number of unknown minutes T.
Between four o'clock and eight o'clock, there are 240 minutes.
There is some point between these two times, before which we have 3 lots of T, and after which we have one lot of T plus 40 minutes.
Therefore, in the 240 minutes, there are 4 lots of T plus 40 minutes.
240 = 4 x T + 40.
Therefore, T = 50 minutes.
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Puzzle 20
Place letters into the grid such that every row, column, and 2 x 2 block has letters (in any order) that form a common word. Each letter is only used once, and no letter is repeated in the rows / cols / blocks.
Letters allowed: W A R M T H
V
O
L
S
I
B
O
A
E
L
Note: this puzzle is not interactive, and the squares cannot be clicked.