Random Puzzles 

Workings

Hint
How far did I travel, and how much fuel did this use?

Answer
I had lost 4 gallons of fuel.

Reasoning
I travelled at 60mph for 4 hours, which is 240 miles.

At 40 miles per gallon this used 6 gallons, which meant the remaining 4 gallons were lost.

Workings

Hint
Look at the letter positions in the alphabet.

Answer
R.

If you take the alphabetic positions of each letter in a row, the total is always 56.

Double-Checking
Y + G + W + A = 25 +  7 + 23 +  1 = 56
K + L + R + O = 11 + 12 + 18 + 15 = 56
Z + J + P + D = 26 + 10 + 16 +  4 = 56
V + F + T + H = 22 +  6 + 20 +  8 = 56

Workings

Hint
The four items form a complete list, and the letters are in the correct order.

Answer
Spring, summer, autumn and winter.

Workings

Hint
It doesn't actually matter how many men or women there were.

Answer
17,760 dollars.

If there were M men, then there were (3552 − M) women.

So one ninth of the men each received 45 dollars and one twelve of the women each received 60 dollars. So the total received was:
= 45 x 1 x M  +  60 x  1 x (3552 − M)
       —              ——
       9              12

Simplify the two fractions by dividing the 45 by 9, and the 60 by 12 respectively.

= 5 x M + 5 x (3552 − M)

= 5M + 17760 − 5M

= 17760