Application of Negative Numbers in Everyday Life

Q.

The temperature at 12 noon was 10 degree Celsius above zero. If it decreases at the rate of 2 degree Celsius per hour, at what time would the temperature be 8 degree Celsius below zero? What would be the temperature at mid night?

Q.

. In a quiz, team A scored – 40, 10, 0 and team B scored 10, 0, – 40 in three

successive rounds. Which team scored more? Can we say that we can add integers in any order?

Q.

The temperature recorded at 12 noon was 15 degrees celsius above 0. it decreases at the rate of 3 degree Celsius per hour until midnight , at what time would the temperature be 9 degree Celsius below zero. What t would be the temperature at midnight?

Q.

Mohan deposits Rs 5, 000 in his bank account and withdraws Rs 3, 642 from it, the next day. If withdrawal of amount from the account is represented by a negative integer, then how will you represent the amount deposited? what is the balance in Mohan’s account after the withdrawal

Q.

In a test, +2 marks are given for each correct answer and ( - 1 ) for each wrong answer. A student has scored 21. If he has attempted total of 12 correct questions. How many questions has he attempted incorrectly ?
[4 MARKS]

Q.

In A class test of 20 questions, 4 marks are given for every correct answers and (-2) marks are given for every incorrect answers Amit attempts all questions and 12 of his answers are correct? what is his total score? With full example

Q.

Subtract the sum of 2 whole 3/7 and -5 whole 4/7 from the difference of 4/15and -2/5

Q.

The temperature at 12 noon was 10 degree Celsius above zero. If it decreases at the rate of 2 degree Celsius per hour until midnight , at what time would the temperature be 8 degree Celsius below zero? What would be the temperature at midnight ?

Q.

In an exam involving negative marking, the maximum marks scored were 75 out of 100 and minimum marks scored were -6. How many marks less is the minimum marks from the maximum marks?

1. -16

2. -6

3. 81

4. 91

Q. In a class test $(+3)$ marks are given for every correct answer and $(-2)$ marks are given for every incorrect answer and no marks for not attempting any question. (i) Radhika scored $20$ marks. If she has got $12$ correct answers, how many questions has she attempted incorrectly? (ii) Mohini scores $(-5)$ marks in this test, though she has got $7$ correct answers How many questions has she attempted incorrectly.

Q.

The temperature at 12 noon was 10°c above zero. If it decreases at the rate of 2°C per hour until midnight , at what time would the temperature be 8°C below zero? What would be the temperature at midnight?

Q. In a class test containing $10$ questions, $5$ marks are award for every answer and $(-2)$ marks are awarded for every incorrect answer and $0$ for question now attempted
(i) Mohan gets four correct and six incorrect answer. What is his score

Q. In a class test containing $10$ questions, $5$ marks are award for every answer and $(-2)$ marks are awarded for every incorrect answer and $0$ for question now attempted
(ii) Reshmma gets five correct answer and five incorrect answer, what is her second

Q.

Going 500 m towards east first and then 200 m back, is same as going 200 m towards west first and then going 500 m back.

1. True

2. Fales

Q.

Write the given number with appropriate signs:

$25°C$ above $0°C$ Temperature.

Q. The temperature at 12 noon was 12℃ above zero (0). If it decreases at the rate of 2℃ per hour until midnight.
(i) What time would the temperature be below 0℃
(ii) What would be the temperature at midnight?

Q. In an exam, Varun gets 4 points for every correct answer and loses 2 points for every incorrect answer. If he gets 3 correct and 7 incorrect answers, then find his total score.

1. 34
2. 22
3. -2
4. -22

Q.

Mohan deposits Rs 2, 000 in his bank account and withdraws Rs 1, 642 from it, the next day. If withdrawal of amount from the account is represented by a negative integer, then how will you represent the amount deposited? Find the balance in Mohan’s account after the withdrawal.

Q. the temperature at 12 noon was 10 degree celcius above zero . if it decreases at the rate of 2 degrees celcius per hour until midnight , at what time would the temperature be 8 degree celius below zero ? what would be the temperature at midnight ?

Q.

In a class test containing 10 questions, 3 marks are awarded for every correct answer, (-1) mark is awarded for every incorrect answer and 0 for the questions not attempted. Srinu gets two correct and six incorrect answers out of eight questions he attempted. What is his total score?

1. 0

2. 2

3. -2

4. 6

Q. Find the value of :
a) -392+ (-5)+ (-8)+ (-15)
b) -137 + 854 —84+ 506
c) subtract (-89) from (-54)
d) 389+ (54) —774+ (-39)

Q. Raghav studies for $4\frac{1}{7}$ hours per day. He devotes $2\frac{4}{5}$ hours of his time for Science and Maths both. How much time does he have left every day to devote for his other subjects? [3 MARKS]

Q.

A man walked 5 km towards North then 8 km towards South. What is his final position with respect to his initial position?

1. -3 units

2. 4 units

3. -4 units

4. 1 unit

Q.

The temperature at 12 noon 10°C above zero.if it decreases at the rate of 2°C per hour until mid night , at what time would the temperature is 8°C below zero?what would the temperature at midnight?

Q.

Write the given number with appropriate signs:

$15°C$ below $0°C$ Temperature.

Q. Simplify each of the following:

Q.

V = 1 - 4t if t<4

V= 5 - 2t if t >6

Find the value of v (m/s) when t = 7

1. 11m/s

2. -19m/s

3. -12m/s

4. -9m/s

Q.

Tati, Sarosh and Goutham were playing a game. The game consisted of 4 rounds. The corresponding scores of each person in that round are shown below. Select the stattements that are true.

$\begin{array}{cccccc}\text{Tati}& 5& -4& 8& 4& a\\ \text{Sarosh}& 5& 6& -1& -2& b\\ \text{Goutham}& 5& 2& -2& 2& c\end{array}$

1. Tati scores the highest after 4 rounds

2. Goutham wins the game.

3. After the 4 rounds, tati's score = 13

4. After the 4 rounds, sarosh's score = 2

Q.

A certain freezing process requires that room temperature should be lowered from 40${}^{\circ }$C at the rate of 5${}^{\circ }$C every hour. What is the room temperature after 10 hours?

1. -5${}^{\circ }$C

2. 0${}^{\circ }$C

3. -10${}^{\circ }$C

4. -15${}^{\circ }$C

Q. Jatin's monthly salary is $12000$. He spends $1450$ for his son's education, $550$ for purchasing clothes, $450$ for purchasing vegetables, milk, etc., $1500$ for purchasing medicine and pays a rent of $5000$ in a particular month. How much does he save in this month?