# How to use Sum Every nth Row in Excel

This example shows you how to create an array formula that sums every nth row in Excel.

# How to use Sum Largest Numbers in Excel

This example shows you how to create an array formula that sums the largest numbers in a range.

# How to use Sum Range with Errors in Excel

This example shows you how to create an array formula that sums a range with errors.

# How to use Sum with Or Criteria in Excel

Summing with Or criteria in Excel can be tricky. This article shows several easy to follow examples.

# How to use System of Linear Equations in Excel

This example shows you how to solve a system of linear equations in Excel.

# How to find the most frequently occurring word in Excel

This example teaches you how to find the most frequently occurring word in Excel.

# How to Count the Errors In Excel

This example shows you how to create an array formula that counts the number of errors in a range.

# How to Count Unique Values In Excel

This example shows you how to create an array formula that counts unique values.

# How to Count with Or Criteria In Excel

Counting with Or criteria in Excel can be tricky. This article shows several easy to follow examples.