Integers Practice Test Sample Question Answers SET 1
An integer is a number that can be written without a fractional component. For example, 21, 4, 0, and −2048 are integers, while 9.75, 5+, and √2 are not. The set of integers consists of zero, the positive natural numbers, also called whole numbers or counting numbers, and their additive inverses.
Integers Practice Test Question Answers
Test SET – 1
1. In a quiz, positive marks are given for correct answers and negative marks are given for incorrect answers. If Jack’s scores in five successive rounds were 25, – 5, – 10, 15 and 10, what was his total at the end?
🔘 20
🔘 25
🔘 30
🔘 35
🔘 45
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Answer: D 35
2. In New York City temperature was – 5°C on Wednesday and then it dropped by 2°C on Thursday. What was the temperature of New York City on Thursday? On Friday, it rose by 4°C. What was the temperature on this day?
🔘 –7° C; –3° C
🔘 7° C; 3° C
🔘 -5° C; –1° C
🔘 5C°; 1° C
🔘 -7° C; 7° C
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Answer: A –7° C; –3° C
3.A water tank has stepped inside it. A monkey is sitting on the topmost step (i.e., the first step). The water level is at the ninth step.
QA. He jumps 3 steps down and then jumps back 2 steps up. In how many jumps will he reach the water level?
🔘 7 jumps
🔘 8 jumps
🔘 9 jumps
🔘 10 jumps
🔘 11 jumps
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Answer: E 11 jumps
3/ QB..After drinking water, he wants to go back. For this, he jumps 4 steps up and then jumps back 2 steps down in every move. In how many jumps will he reach back the top step?
🔘 4 jumps
🔘 5 jumps
🔘 6 jumps
🔘 7 jumps
🔘 8 jumps
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Answer: B 5 jumps
5. In a class test containing 15 questions, 4 marks are given for every correct answer and (–2) marks are given for every incorrect answer. Daniel attempts all questions but only 9 of her answers are correct. What is her total score?
🔘 24
🔘 56
🔘 -24
🔘 -12
🔘 36
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Answer: A 24 So, marks given for 9 correct answers = 4 × 9 = 36
Marks given for one incorrect answer = – 2
So, marks given for 6 = (15 – 9) incorrect answers = (–2) × 6 = –12
Therefore, Gurpreet’s total score = 36 + ( –12) = 24
6. Suppose we represent the distance above the ground by a positive integer and that below the ground by a negative integer, then answer the following:
6 (i) An elevator descends into a mine shaft at the rate of 5 meters per minute. What will be its position after one hour?
🔘 50
🔘 150
🔘 200
🔘 250
🔘 300
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Answer: E 300 Change in position of the elevator in one minute = – 5 m Position of the elevator after 60 minutes = (–5) × 60 = – 300 m, i.e., 300 m below down from the starting position of the elevator.
6 (ii) If it beings to descend from 15 m above the ground, what will be its position after 45 minutes?
🔘 60 m
🔘 110 m
🔘 180 m
🔘 210 m
🔘 330 m
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Answer:D 210 m Change in position of the elevator in 45 minutes = (–5) × 45 = –225 m, i.e., 225 m
below ground level. So, the final position of the elevator = –225 + 15 = –210 m, i.e., 210 m below ground level.
8. For any integer a, what is (–1) × a equal to?
🔘 a
🔘 1
🔘 0
🔘 -1
🔘 -a
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Answer: E -a
9. A certain freezing process requires that room temperature be lowered from 40°C at the rate of 5°C every hour. What will be the room temperature 10 hours after the process begins?
🔘 10°C
🔘 – 10°C
🔘 0 °C
🔘 – 20°C
🔘 20°C
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Answer: B – 10°C
10. A cement company earns a profit of $8 per bag of white cement sold and a loss of $5 per bag of grey cement sold.
10 (a) The company sells 3,000 bags of white cement and 5,000 bags of grey cement in a month. What is its profit or loss?
🔘 Loss of $ 1000
🔘 Profit of $ 1000
🔘 Loss of $ 2000
🔘 Profit of $ 2000
🔘 NOTA
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Answer: A Loss of $ 1000
10. (b) What is the number of white cement bags it must sell to have neither profit nor loss, if the number of grey bags sold is 6,400 bags.
🔘 1000 bags
🔘 2000 bags
🔘 3000 bags
🔘 4000 bags
🔘 5000 bags
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Answer: D 4000 bags
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