A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

What is the longest word in the dictionary?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

How many triangles are there on the puzzle below?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?