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

O_er_t_o_

Complete the missing letters of the given word.

Count the squares in the matchstick puzzle below?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Replace the question mark with the number below given a simple math problem.

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag. Randomly remove two balls from the bag. * If they are of different colors, put the blue one back in the bag. * If they are the same colour, take them out and put a red ball back in the bag. Repeat this until only one ball remains in the bag. What is the color of the sole ball left in the bag ?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

What has to be broken before you can use it?