Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

How can you take 2 from 5 and leave 4?

It is always ahead of me yet I can never see it. What is it?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

What Time Should the last watch show in the below figure?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?