UIL number sense practice

Front

What is the sum of the series 12 + 16 + 20 + 24?

Back

The sum is 72.

Front

How do you calculate the sum of the first n odd numbers?

Back

The sum of the first n odd numbers is n^2. For n=10, the sum is 10^2 = 100.

Front

What is 625 divided by 25?

Back

625 divided by 25 equals 25.

Front

How do you perform the operation 24 + 12 ÷ 4?

Back

First, divide 12 by 4 to get 3, then add 24 + 3 to get 27.

Front

What is the result of 621 - 216?

Back

The result is 405.

Front

What is the formula for the sum of an arithmetic series?

Back

The sum S of an arithmetic series can be calculated using the formula S = n/2 * (a + l), where n is the number of terms, a is the first term, and l is the last term.

Front

What is the definition of an odd number?

Back

An odd number is an integer that is not divisible by 2.

Front

What is the process for dividing two numbers?

Back

To divide two numbers, you determine how many times the divisor can fit into the dividend.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

How do you find the average of a set of numbers?

Back

To find the average, sum all the numbers and then divide by the count of numbers.