Problems Involving Difference of Fractions

Q.

Find the difference $\frac{5}{7}-\frac{2}{7}$.

Q. In a test, +2 marks are given for each correct answer and ( - 1 ) for each wrong answer. A student scored 21 and answered 12 questions correctly. How many questions did he answer incorrect? How many questions did he attempt in total? [4 MARKS]

Q.

$10-3\frac{1}{2}$

1. $7\frac{1}{2}$

2. $-7\frac{1}{2}$

3. $-6\frac{1}{2}$

4. $6\frac{1}{2}$

Q.

Niki is playing a game. Each correct answer gets 1 mark, and for each wrong answer $\frac{1}{2}$ a mark gets reduced. If Niki got 1 answer right, and 9 answers wrong, what would be her total marks?

1. $-3\frac{1}{2}$

2. $-6\frac{1}{2}$

3. $-7\frac{1}{2}$

4. $-2\frac{1}{2}$

Q.

$-20-3\frac{1}{2}$ = ___

1. -23$\frac{1}{2}$

2. 23$\frac{1}{2}$

3. -13$\frac{1}{2}$

4. 13$\frac{1}{2}$

Q.

Arun's phone has a balance of Rs. 1. After speaking on phone for a while, his balance reduced by 7$\frac{1}{2}$ Rs. Find his new balance.

1. - 9$\frac{1}{2}$ Rupees.

2. - 6$\frac{1}{2}$ Rupees.

3. - 10$\frac{1}{2}$ Rupees.

4. - 21$\frac{1}{2}$ Rupees.

Q.

$(-4\frac{1}{2}-3\frac{1}{2})$ = ____

1. -3

2. -8

3. 8

4. 2

Q.

Bittu has fever. At 9 A.M, his temperature was 36°C, At 1 AM, his temperature decreased by $2\frac{1}{2}$°C. Find his temperature after the decrease.

1. $33\frac{1}{2}$°C

2. $23\frac{1}{2}$°C

3. $23\frac{1}{2}$°C

4. $30\frac{1}{2}$°C

Q.

1/2 - 1 = ____

1. -1/2

2. 3/2

3. 5/2

4. 7/2

Q.

Rani ate $\frac{2}{7}$ part of a cake while her brother Ravi ate $\frac{4}{5}$ of the remaining. Part of the cake left is

Q.

$\left(\frac{1}{5}\right)$ divided by $\left(\frac{4}{5}\right)$ is-

1. 4/1

2. 1/5

3. 5/4

4. 1/4

Q.

$(-9\frac{1}{2}-\frac{1}{2})$ = ____

1. -7

2. -4

3. -10

4. 10

Q.

$-2\frac{1}{2}-3\frac{1}{2}$ = _____

1. 9

2. -6

3. -4

4. 6

Q.

$3\frac{1}{2}-4\frac{1}{2}$ = ______

1. -1

2. $-3\frac{1}{2}$

3. $-1\frac{1}{2}$

4. $5\frac{1}{2}$

Q.

A student gets 3 marks for answering a question correctly and loses 1 mark for answering it wrong. Suppose if he answers 5 questions correctly and 2 questions wrong, then marks scored by him is:

1. 15

2. 13

3. 14

4. 16

Q.

$-11\frac{1}{2}+\frac{1}{2}$ = ____

1. -12

2. -11

3. 12

4. -10

Q.

An examination has 10 questions. Each correct answer gets 1 mark, and for each wrong answer $\frac{1}{2}$ a mark gets reduced. If Anu got 3 answers right, and 7 answers wrong, what would be her total marks?

1. $\frac{9}{2}$

2. $\frac{-1}{2}$

3. $\frac{1}{2}$

4. $\frac{-1}{8}$

Q.

-$3\frac{1}{2}-4\frac{1}{2}$ = ______

1. -8

2. 7 $\frac{1}{2}$

3. -7 $\frac{1}{2}$

4. -9 $\frac{1}{2}$

Q. $(1-\frac{1}{2})+(\frac{3}{4}-\frac{1}{4})=$

1. $\frac{1}{2}$
2. $\frac{3}{4}$
3. $1$
4. $0$

Q.

After buying a toy from the shop, I am left with Rs.15 from my 100 rupees of pocket money. Then the cost of toy (in rupees) is:

1. 15

2. 100

3. 85

4. 75