Answer:
Name four days of the week that start with the letter “T.”
What leaps one time out of four?
If there are three cups of sugar and you take one away, how many do you have?
What is used by man, tossed by trees, everywhere but unseen?
There are four of these, but everyone's favorite seems to be spades.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.