Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

How many triangles can you count in the figure given?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

what's the probability of getting a king or a queen from a pack of 52 cards?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

Can you find the missing piece of the Porsche?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.