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1. What is the next number in the sequence: 1, 2, 4, 7, 11, 16, 22, 29, ?

2. A man has 3 daughters. Each daughter has two brothers and two sisters. How many children does the man have?

3. What is the result of the operation 6 x 13 + 40 - 24 ?

4. A book costs $25 and there is an 8% tax. How much do you have to pay in total?

5. What is the result of the operation 75/2 - 7 ?

6. A man has 16 dogs. Each dog has 7 bones. How many bones are there in total?

7. Solve for x in the following equation: 4x - 20 = 92

8. What is the next number in the sequence: 3, 9, 27, 81 ?

9. What is the result of the operation 9 x 12 - 4 x 11 ?

10. In a triangle, the length of the hypotenuse is 10 cm and one of the legs is 6 cm. What is the length of the other leg? c² = a² + b²

11. A circle has a diameter of 14 cm. What is the area of the circle? Area = 3.14 × (diameter/2)²

12. A rectangular prism has a length of 8 cm, a width of 5 cm, and a height of 3 cm. What is the volume of the prism?

13. In a right triangle, the length of one leg is 3 cm and the length of the other leg is 4 cm. What is the length of the hypotenuse? c² = a² + b²

14. A snail is at the bottom of a 20-foot well. Each day, it climbs up 3 feet, but at night, it slips back 2 feet. How many days will it take for the snail to reach the top of the well?

15. A group of friends want to share some candy equally. If they have 135 pieces of candy and there are 3 friends, how many pieces of candy will each friend get?

16. A water tank can hold 240 gallons of water. If 120 gallons of water are already in the tank, and 30 gallons of water are added every hour, how many hours will it take to fill the tank?

17. A bakery sells 250 loaves of bread per day. If each loaf of bread costs $2.50, and the bakery operates 7 days a week, how much money does the bakery make in a week?

18. A car travels from City A to City B at an average speed of 60 miles per hour. If the distance between the two cities is 210 miles, how many hours does the trip take?

19. What is the value of x in the equation : 4x + 12 = 40

20. A group of friends want to share some money equally. If they have $1200 and there are 5 friends, but 2 friends decide to leave, how much money will each of the remaining friends get?

21. What is the result of the equation: 60 × 5 + 72/8?

22. A circle has a diameter of 14 cm. What is its circumference ?

23. What is the missing number in the sequence: 2, 6, 12, 20, 30, 42, 56, ?

24. A cube has a side length of 6 cm. What is its volume?

25. What is the value of x in the equation? 5x + 5 = 65

Where Does IQ Come From ?

Have you ever wondered who invented the IQ test? The story is fascinating.

The concept of measuring intelligence started in France, not in a lab.

1904: The Beginning in Paris

The French government asked psychologist Alfred Binet to find a way to identify children who needed extra help at school. With his colleague Théodore Simon, Binet created the first intelligence test in 1905. It was called the Binet-Simon Scale. Its goal was not to label children as smart or dumb, but to help them.


1916: The IQ Score is Born in America

Psychologist Lewis Terman at Stanford University adapted Binet's test for America. He created the Stanford-Binet test and introduced the famous formula: IQ = (Mental Age / Chronological Age) x 100. This is where the term "Intelligence Quotient" or IQ was first used.


WWI: The Army Test

During World War I, the US Army needed to test 1.7 million recruits quickly. Psychologist Robert Yerkes created the Army Alpha and Beta tests. This was the first time IQ testing was used on a massive scale.


Today: Modern Tests

Modern tests like the WAIS (Wechsler Adult Intelligence Scale) no longer use the old formula. They compare your score to the average of other people your age. The average is set to 100.


So, your IQ score today comes from over 100 years of history, from a small classroom in Paris to a test taken by millions online like on IQThinker.