Which tank will fill first?

Why is 6 afraid of 7?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

How many triangles can you find in this given picture?

Can you replace the question mark with the correct number in the below table sequence?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

Replace the question mark with the correct number in the below-given picture?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?