Sophie draws kangaroos: a blue one, then a green, then a red, then a black, a blue, a green, a red, a black, and so on…What colour is the 29th kangaroo? 

Minous has 16 cards: 4 spades (♠), 4 clubs (♣), 4 diamonds (♦) and 4 hearts (♥). She wants to arrange them in the square below, in such a way that every row and every column has a card of each sort. In the square below you can see how she started. What sort must be put in the square marked by the question mark?  

In 2016 the Flying Turtles finished their baseball season with a record of 95 wins and 67 losses. The Dolphins finished the season with 84 wins and 78 losses. The Flying Turtles and Dolphins played each other 19 times during the season. If the Flying Turtles had F wins against teams other than the Dolphins, and the Dolphins had D wins against teams other than the Flying Turtles, what is the value of F + D? 

The lift force on an airplane during flight is directly proportional to the surface area of the wing. Orville builds a model airplane and goes outside to play. Orville’s little brother, Wilbur, builds a mini replica of Orville’s plane that is half as long in every linear dimension. What is the ratio of the lift force on Wilbur’s plane to that on Orville’s plane? Express your answer as a common fraction.

When three consecutive positive integers are multiplied, the product is 16 times the sum of the three integers. What is the difference of the product minus the sum?

For each child, Kiddie Day Care charges $330 per month for preschool and $5.50 per hour for each hour of after-school care. If Cody’s cost was $770 for his son’s child care last month, how many hours did his son spend in after-school care? 

Olivia Justynski earned scores of 82, 86 and 92 on her first three tests. What score does she need on her fourth test to achieve an average score of 90 on the four tests?

A family farm is equally divided among three heirs: Jim, Jan and John. John’s share of the farm is then equally divided among his three heirs: Peter, Paul and Patricia. Paul decides to sell his share of the farm, and then later the family decides to sell the remainder of the farm all at once. What portion of the proceeds from the most recent sale should Jim receive? Express your answer as a common fraction.

In the hardware store, Matt goes to the fastener aisle, which has wood screws, sheet metal screws, hex bolts, carriage bolts and lag bolts. How many ways can he choose 10 fasteners if he needs at least one of each kind?

If each letter in the sum A.BC + D.EF represents a different nonzero digit, what is the least possible value of the sum? Express your answer as a decimal to the nearest hundredth.

What is the maximum area of a rectangle with a diagonal of length 16 units?

If 3x + 5 = 13, what is the value of the expression (3x + 2)(3x + 3)(3x + 4)?

If the point (8, 9) is the center of a circle of radius 10 units, at how many points does the circle intersect the coordinate axes?

What is 110011\(_2\) when rewritten in base eight?

Suppose Luke spins the pointer on a fair 3-color spinner twice. What is the probability that the pointer lands on the same color twice? Express your answer as a common fraction. 

(#553 - 1000 best IQ questions in history)

MISSING SYMBOLS

Add a "+" or a "-" at anywhere you like in this equation so it make sence (no adding in the number 100)

1   2   3   4   5   6   7   8   9   =   100

(#606 - 1000 best IQ questions in history)

TWO "SPECIAL" NUMBERS

Can you find the rules of the numbers 220 and 284? What does these pair-number called?

(#783 - 1000 best IQ questions in history)(1880s mathematic shocking question)

SAM LOYD'S 14-15 QUESTION

With sliding the numbers (shown below) can you swap the number 14 and number 15 with each other like the figure below:

 to

(#998 - 1000 best IQ questions in history)

ROLL A DICE [2]

If you roll a stardard dice six times, then what is the probability that will roll 6 same surfaces? (e.g: 1-1-1-1-1-1)

(#1 - 1000 best IQ question in history)

Can you prove that 7 is a half of 12? Use all the knowledge you know about maths.