ISEE Primary 4 Math

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ISEE Middle Level Quantitative Reasoning › ISEE Primary 4 Math

Questions 1 - 10

A bag contains $\small 2$ red marbles, $\small 7$ pink marbles, and $\small 6$ purple marbles. What is the probability of not choosing a purple marble?

$\small \frac{3}{5}$

$\small \frac{2}{5}$

$\small \frac{2}{3}$

$\small \frac{3}2$

Explanation

The probability (p) is equal to the number of a specific event (purple marbles) divided by the total number of events. The probability of NOT p (called q) is equal to $\small 1-q.$ In this example:

$\small P_{purple}=\frac{6}{2+7+6}=\frac{6}{15}=\frac{2}{5}$

$\small Q_{not\ purple}=1-\frac{2}{5}=\frac{3}{5}$

Find the range in this set of numbers:

Explanation

First, order the numbers from least to greatest:

Then, subtract the smallest number from the largest:

Answer: The range is 11.

Find the mode of this set of numbers:

Explanation

The mode is the number that appears most frequently in the data set.

Answer:

Find the mode in this set of numbers:

22, 24, 28, 23, 27, 24, 29, 35, 23, 42, 42, 24, 26, 25, 26.

Explanation

Find the number that appears most frequently.

Answer: The mode is 24.

Which is greater?

(A)

(B)

(B) is greater

(A) is greater

(A) and (B) are equal

It is impossible to determine which is greater from the information given

Explanation

$-7K\div (-7) = 91 \div (-7)$

$-6M \div (-6) = 72 \div (-6)$

, so .

Therefore , so (B) is greater.

Solve the equation:

Explanation

To solve to the equation isolate the variable on one side of the equation with all other constants on the other side. To accomplish this perform opposite operations to manipulate the equations.

First subtract 18 from both sides.

Now divide by 8 on both sides.

$8t \div 8 = 114 \div 8$

What is the pattern for the numbers in the X column to the numbers in the Y column?

Screen shot 2015 09 23 at 10.33.31 am

Add

Multiply

Add

Explanation

is added to each X value to get the Y value.

To find the rule, you may have to do some trial and error. The most important thing to remember is, once you think you have the rule, make sure to test the rule with all of the X values.

A Math class took an exam. Here are the scores of 11 students:

Find the range.

Explanation

To find the range of a data set, we will find the smallest and the largest number. Then, we will find the difference of those two numbers.

So, given the set

We can see the smallest number is 76 and the largest number is 98. Now, we will find the difference. To find the difference, we will subtract the two numbers. We get