Analyzing Integers and Classifying Numbers

Write an integer to represent the situation. Abigail withdrew $15 from her checking account.

• 15

• 10

• -15

• -10

Answer explanation

The question asks for an integer to represent the situation where Abigail withdraws $15 from her checking account. In financial terms, withdrawal is represented by a negative number. Hence, '-15' correctly represents the amount Abigail withdrew.

Write an integer to represent the situation. by noon, the temperature had risen 5 degrees Fahrenheit.

• 15

• +5

• -15

• -5

Answer explanation

The question asks for an integer representation of a situation where the temperature had risen 5 degrees Fahrenheit by noon. Given the options, we see that '+5' is the correct representation. This is because a rise in temperature is usually represented by a positive number.

John has a few numbers in his mind. Which of the following numbers that John is thinking of is an integer?

• 0.2

• 7

• -3.5

• 3/4

Answer explanation

The question asks for the integer number that John is thinking of. An integer is a whole number, without any decimal point. Looking at the options, only '7' qualifies as an integer, as it is not a fraction or a decimal. Therefore, the correct answer is '7'.

Which of the following numbers is not a natural number

• 16

• 20

• 0

• 1

Answer explanation

The question asks which of the provided numbers is not a natural number. Natural numbers are the set of all positive integers starting from 1. They do not include zero or any negative number. Hence, the correct answer is 0.

Which of the following numbers is not a whole number?

• 5

• 598

• 22

• -13

Answer explanation

The question asks which of the given numbers is not a whole number. A whole number is always positive and includes zero, but does not include negative numbers. In the provided options, -13 is a negative number and therefore, it is not a whole number.

Rick is playing his M-1 Mystery Solvers video game. When he misses a clue, a message says –15 points, and his score decreases by 15 points. If Rick solves a mystery, a message says 100 points. Which of these describes what happens to Rick's score when he solves a mystery?

• it decreased by 100 points

• it stays the same

• it increased by 100 points

Answer explanation

The question talks about the point system in Rick's M-1 Mystery Solvers video game. When Rick misses a clue, his score decreases by 15 points, but when he solves a mystery, his score increases. Given the options, it's clear that Rick's score increases by 100 points when he solves a mystery, as indicated in the question itself.

The airport with the lowest elevation in the world is Bar Yehuda Airfield in Israel. It has an elevation of –386 meters. Which of these describes the elevation of Bar Yehuda Airfield?

• below sea level

• at sea level

• above sea level

Answer explanation

The question asks about the elevation of Bar Yehuda Airfield in Israel, which is given as –386 meters. This numerical value is a negative figure, indicating that it is below the conventional reference point, which is sea level. Hence, the correct choice is 'below sea level'.

When the value of KQO Inc. stock fell 3 points, the change was represented online as –3 points. The next day, the change in value of the stock was represented as –1 point. Which of these describes the change in the stock's value?

• it fell 1 point

• it neither rose nor fell

• it rose 1 point

Answer explanation

The question states that the value of KQO Inc. stock fell by 3 points and then changed by -1 point. This change of -1 point means the stock's value decreased by 1 point. Therefore, the correct option that describes the stock's value change is 'it fell 1 point'.

The national capital with the lowest elevation in the world is Baku, the capital of Azerbaijan. Its elevation is 92 feet below sea level. What integer represents Baku's elevation?

• +92

• -92

• 0

Answer explanation

The question asks for the integer representation of Baku's elevation, which is 92 feet below sea level. In this context, 'below sea level' implies a negative value. Therefore, the correct answer is -92, as it accurately represents Baku's elevation below sea level.

The glass-bottomed skyboxes in Chicago's Willis Tower have an elevation of 412 meters above sea level. What integer represents the elevation of Willis Tower's skyboxes?

• +412

• -412

• 0

Answer explanation

The question states that the Willis Tower's skyboxes are 412 meters above sea level. Therefore, the integer that represents their elevation would be +412, as it indicates an increase or height above sea level. The options -412 and 0 do not accurately represent the stated elevation.