Good Riddles

Question: Thomas has missed an excessive number of days of school, so he must meet with Principal Davis. Mr. Davis asks him "Why on Earth have you missed so many days?"

Thomas replies "There just isn't enough time for school. I need 8 hours of sleep a day, which adds up to about 122 days a year. Weekends off is 104 days a year. Summer vacation is about 60 days. If I spend about an hour on each meal, that's 3 hours a day or 45 days a year. I need at least 2 hours of exercise and relaxation time each day to stay physically and mentally fit, adding another 30 days.

Add all of that up and you get about 361 days. That only leaves 4 days for school."

The principal knows Thomas is full of it, but can't figure out why. Where is Thomas going wrong?

Question: What has one foot but not a single leg?

Question: First think of a person who lives in disguise,
who deals in secrets and tells naught but lies.
Next tell me what is always the last thing to mend,
the middle of middle the end of the end?
And finally give me a sound often heard during the search of a hard-to-find word.
Now string them together and answer me this,
which creature would you be unwilling to kiss?

Question: I have four wings, but cannot fly.
I never laugh and never cry;
On the same spot I'm always found, toiling away with a little sound.

What am I?

Question: What has holes on each side, but can still can hold water?