Solve the equation: 2x + 5 = 13
x = 4
What is the smallest unit of matter?
Atom
Which ancient civilization built the Great Pyramids of Giza?
Ancient Egyptians
If a triangle has two angles measuring 40 degrees and 80 degrees, what is the measure of the third angle?
60 degrees
What is the unit of measurement for electric current?
Ampere (A)
Which famous explorer is credited with discovering America?
Christopher Columbus
How many sides does a hexagon have?
6
What is the formula for calculating density?
Mass / Volume
Who was the President of the United States during the Civil War?
Abraham Lincoln
If the ratio of boys to girls in a class is 3:5 and there are 32 students in total, how many girls are there?
20 girls
What is the largest organ in the human body by surface area?
The liver
Who is known as the "Father of the American Revolution"?
Samuel Adams
Calculate the area of a circle with a radius of 5 centimeters. (Use π = 3.14)
78.5 square centimeters
What is the main component of Earth's atmosphere?
Nitrogen (approximately 78%)
What was the name of the peace treaty that ended the First World War?
Treaty of Versailles