Grade 7 Battle of the Brains 2025

What numbers cannot be represented as a ratio of integers?

• Counting numbers

• Whole numbers

• Natural numbers

• Irrational numbers

If a car travels 100 meters in 5 seconds, what is its speed?

• 4 m/s

• 5m/s

• 20 m/s

• 25 m/s

What kind of electricity is generated through friction between two materials?

(a)  

What is the perimeter of a regular hexagon if each side measures 7cm?

• 24 sq. cm.

• 42 sq. cm.

• 49 sq. cm.

• 94 sq. cm.

What is the term for a substance made up of two or more elements chemically combined in a fixed ratio?

• Ionic Bond

• Compound

• 1. Covalent Bond

• Cation

How much current flows through a lamp which has 240 ohms of resistance, when a pressure of 120 volts is applied to its terminals?

(a)  

A pizza was divided into 8 slices​. Anna ate 4 slices, how much pizza is left? Express your answer in percent form.

• 20%

• 40%

• 50%

• 60%

What term describes the process where animals breathe in oxygen and release carbon dioxide?

• Digestion

• Transpiration

• Metabolism

• Respiration

Which of the following computer components is used to store temporary memory, which is lost when the power is turned off?

• Hard Drive

• Read Only Memory

• Universal Serial Bus

• Random Access Memory

Considering the figure below, what is the value of x?

• 540 degrees

• 377 degrees

• 163 degrees

• 153 degrees