What is harder to catch the faster you run?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

What is wrong in the below Picture?

Can you count the number of triangles in the given figure?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

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!

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

I taste better than I can smell. Who am I?

Can you find out the remainder when 3^300 is divided by 5?