Maths-

General

Easy

Question

# Teacher tells the Class that highest marks obtained by student in her class is twice the lowest marks plus 7 . The highest score is 87 . What is the lowest score?

- 42
- 49
- 40
- 44

## The correct answer is: 40

### Let the lowest mark =x.

According to question

Highest marks =2× Lowest mark +7

87=2 x X +7

87 = 2x + 7

or,

2x+7=87

2x+7-7=87-7

2x=80

Dividing both sides by 2 .

x=40

∴ Lowest score is 40

### Related Questions to study

Maths-

### Polly is measuring the temperature of different chemical mixture. The temperature of two mixtures are shown in table as

Which mixture has highest absolute value

### Polly is measuring the temperature of different chemical mixture. The temperature of two mixtures are shown in table as

Which mixture has highest absolute value

Maths-General

Maths-

### Which of the following represents x 4

### Which of the following represents x 4

Maths-General

Maths-

### Janier earns a profit of $2a every day How much money will she earn at a profit at the end of 4 days.

### Janier earns a profit of $2a every day How much money will she earn at a profit at the end of 4 days.

Maths-General

Maths-

### In a classroom then are 45 students in which 30 are boys are rest are female, find the ratio of number of girls to the number of boys.

### In a classroom then are 45 students in which 30 are boys are rest are female, find the ratio of number of girls to the number of boys.

Maths-General

Maths-

### Find the area between the two concentric circles of radius 3cm and 4cm.

### Find the area between the two concentric circles of radius 3cm and 4cm.

Maths-General

Maths-

### Which of the following is correct:

### Which of the following is correct:

Maths-General

Maths-

### Lawren has $1000 in a saving account. He wants to save at least $400 before winter. He withdraws $50 every week for daily requirements. Write an inequality that represents Lawren’s situation.

For such questions, we have to see which quantity is constant and variable. We have be careful about the words like “at least”, “at most”, etc.

### Lawren has $1000 in a saving account. He wants to save at least $400 before winter. He withdraws $50 every week for daily requirements. Write an inequality that represents Lawren’s situation.

Maths-General

For such questions, we have to see which quantity is constant and variable. We have be careful about the words like “at least”, “at most”, etc.

Maths-

### A man goes 3 kms east from point A and takes right tum from point B to move 4 kms to point c. What is the minimum distance between paint A and point C

### A man goes 3 kms east from point A and takes right tum from point B to move 4 kms to point c. What is the minimum distance between paint A and point C

Maths-General

Maths-

### The more time people spend using social media, the less they read books. Identify the independent variable.

### The more time people spend using social media, the less they read books. Identify the independent variable.

Maths-General

Maths-

### While solving math problems one of the group calculator and the other did manually. First group which used calculator was able to complete the assignment early. What is dependent variable

### While solving math problems one of the group calculator and the other did manually. First group which used calculator was able to complete the assignment early. What is dependent variable

Maths-General

Maths-

### Nine workers could finish the work in five days, whereas 6 workers do the same work in 8 days. Identify the independent variable

### Nine workers could finish the work in five days, whereas 6 workers do the same work in 8 days. Identify the independent variable

Maths-General

Maths-

### While measuring the temperature at different depths, scientists found that temperature v aried. What is independent variable

### While measuring the temperature at different depths, scientists found that temperature v aried. What is independent variable

Maths-General

Maths-

### Chandler is travelling from Ottawa to Alberta. What is dependent variable

### Chandler is travelling from Ottawa to Alberta. What is dependent variable

Maths-General

Maths-

### Cost of 1Kg apple is $12. Identify the independent quantity.

### Cost of 1Kg apple is $12. Identify the independent quantity.

Maths-General

Maths-

### Find the shaded area between two circles.

### Find the shaded area between two circles.

Maths-General