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

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?

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

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.

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.

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

Which of the following is correct:

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.

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

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

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

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

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

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