MATH CHALLENGE (Grade 7)

Which of the following is NOT an empty set?

• a. {vowels in the word rhythm}

• b. {day in a week that starts with the letter j} 

• c. {bicycle with four wheels}

• d. {soldiers in the Philippines}

What is the additive inverse of 5?

What property of addition is shown in (10+8) + 6 = 6 + (10+8)?

• Commutative

• Associative

• Distributive

• Identity

Write 0. 000 000 000 085 in scientific notation.

Translate into symbols: use x for the number.

“Two-THIRDS of a number SUBTRACTED FROM THREE times the number”

3 kilometer (km) is equivalent to how many centimeters?

Ordinary liquid water freezes into ice when its temperature drops to zero degrees celsius. Find the equivalent value in °F for the ice point.