Riddle: Name an eight-letter word that has kst in the middle, in the beginning, and at the end. What is it?
Answer: Inkstand - kst is in the middle. "In" is the beginning, and "and" ends the word.
Riddle: I have three feet but can't walk; I tell you things but can't talk; Sometimes I bend but I'm mostly straight. I'm like a scale but can't tell your weight. What am I?
Answer: A yardstick.
Riddle: I'm found in the sea and on land but I can't walk or swim. I travel by foot but I'm toe less. No matter where I go I'm never far from home. What am I?
Answer: A snail.
Difficult Riddles
Riddle: Different lights do make me strange, thus into different sizes, I will change. What am I?
Answer: I am the pupil of an eye.
Riddle: If 4+2=26, 8+1=79 and 6+5=111. Then, what is 7+3?
Answer: 410. 4+2=26 is because 4-2=2 and 4+2=6,so it is 26. Therefore, 7-3=4 and 7+3=10(410).
Difficult Riddles
Riddle: It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?
Answer: A car.
Riddle: Find the four digit number in which the first digit is one fourth of the last digit, the second digit is 6 times the first digit, and the third digit is the second digit plus 3. What is it?
Answer: 1694.
Difficult Riddles
Riddle: What is the next number in the sequence? 2, 3, 5, 9, 17, _
Answer: 33. The pattern:  Double the previous number and subtract 1.
Riddle: My thunder comes before the lightning; My lightning comes before the clouds; My rain dries all the land it touches. What am I?
Answer: A volcano.
Riddle: A man was found dead in his study. He was slumped over his desk and a gun was in his hand. There was a cassette recorder on his desk. When the police entered the room and pressed the play button on the tape recorder they heard: "I can't go on. I have nothing to live for." Then there was the sound of a gunshot. How did the detective immediately know that the man had been murdered and it wasn't a suicide?
Answer: The cassette had started at the beginning of the man's utterance. Someone else had to be there to rewind the tape.