Practice MCQs
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Showing 10 of 276 total MCQs (page 17 of 28)
Explanation: The sum of the interior angles of any triangle is always 180°. This is a fundamental theorem in Euclidean geometry.
Explanation: The Highest Common Factor (HCF) of 18 and 24 is 6. Factors of 18: 1,2,3,6,9,18. Factors of 24: 1,2,3,4,6,8,12,24. The highest common factor is 6.
What is 25% of 400?
Explanation: 25% of 400 = (25/100) × 400 = 0.25 × 400 = 100. A quick way: 25% = 1/4, so 400 ÷ 4 = 100.
Explanation: The Least Common Multiple (LCM) of 4 and 6 is 12, the smallest number divisible by both. Multiples of 4: 4,8,12... Multiples of 6: 6,12...
Explanation: The Ring of Fire is a major area in the Pacific Ocean basin where many earthquakes and volcanic eruptions occur, containing about 90% of the world's earthquakes.
Explanation: Seasons are caused by Earth's axial tilt of 23.5°. As Earth orbits the Sun, different hemispheres receive more direct sunlight at different times of year.
Explanation: The ozone layer is located in the stratosphere, approximately 15-35 km above Earth's surface, and protects life by absorbing harmful UV radiation.
Explanation: The Richter scale (now largely replaced by the Moment Magnitude Scale) measures the magnitude or energy released by earthquakes.
Explanation: The crust is the outermost solid layer of Earth. It is 5-70 km thick and is divided into oceanic crust (thinner) and continental crust (thicker).