There are 5 steps to a flight of stairs. Chatdanai can take 1 or 2 steps up at a time. How many ways are there for him to do so?
There are 5 black, 3 orange and 4 red balls in a bag. Without looking into the bag, how many balls must Shawn take so he will have at least 1 ball of each colour?
Each circle represents a number. The number in the last circle is shown below. What is the number in the 1st circle?
The sum of dates of all Wednesdays in a certain month is 66. On which day of the week was the 1st day of the month?
How many shortest paths are there from π΄ to π΅? Follow the direction of the arrows.
Mark saw the reflection of an old clock. What was the actual time?
The perimeter of a figure is found by measuring the total length of its outline. Each figure below is made up of 6 small rectangles. Which of the following statements is TRUE?