Height of 5 students in a classroom are 125 cm,134 cm, 157 cm,110 cm,146 cm.
Find the range of height

These are the first eight ionization energies for a particular neutral atom. All values are expressed in MJ mol^-1. How many valence electrons do/does this atom possess?

1st	2nd	3rd	4th	5th	6th	7th	8th
1.31	3.39	5.30	7.47	10.99	13.33	71.33	84.01

1. 1    
2. 2    
3. 4    
4. 6    

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?

1. 44
2. 49
3. 42
4. 40

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

1. Acetone
2. Equal
3. Bromine
4. Can't be determined

Which of the following represents x  4

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

1. $180
2. -$180
3. $175
4. -$175

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.

1. 1:2
2. 4:16
3. 1:1
4. 1:4

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

1. 22 cm²
2. 22/7 cm²
3. 7 cm²
4. 16 cm²

Which of the following is correct:

1. 2y -4(x+2) = 2y -4x +8
2. 2y +4(x+2) = 2y +4x+8
3. 2y -4(x+2) = 2y-4x+2
4. 2y + 4(x+2) = 2y +4x+2

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.

1. 1000+50w  400
2. 1000-50w   400
3. 1000 + 50w400
4. 1000-50w 400

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

1. 5 kms
2. 10 kms
3. 8 kms
4. 7.5 km

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

1. Time on social media
2. Less books read

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

1. Use of calculator
2. Time
3. Problem

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

1. No. of worker
2. Time taken to complete the work

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

1. Depth
2. Temperature
3. Measurements

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

1. Time
2. Speed 
3. Distance