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Excel tasks with worked examples
All guidesHow to Remove Duplicates in Excel
Compare Email-only and whole-row duplicates using copyable data and expected results.
Read guideHow to Combine Two Columns in Excel
Copy the name example, compare joined results, and keep values before deleting source columns.
Read guideHow Do You Merge Cells in Excel
Compare merging with text combination, see the data-loss example, and fix a disabled Merge button.
Read guideHow to Freeze a Row in Excel
Use the A2/B2/C3 selection table to freeze headers, multiple rows, or rows and columns together.
Read guidePractice with data and worked formulas
All sample dataStudent grades CSV, Excel & JSON
Preview the long-format score records and download the format you need.
OpenMessy data for cleaning practice
Inspect padded text, duplicate rows and mixed types before downloading.
OpenInteractive formula practice
Use a small grid, enter a formula and compare it with the accepted answers.
OpenPlot Irregular Time Intervals in an Excel Chart
Plot uneven timestamps using real X values, with a worked example comparing 6-hour and 36-hour gaps.
Read guideCount Only Visible Blank Cells in Excel
Count blanks after filtering, including a choice between empty cells and empty-string formulas.
Read guideExcel Rolling Average with Conditions: Last 7 Days
Calculate a seven-day average for one category and check the date boundaries and missing values.
Read guideThree ways to get unstuck.
Look up an answer, run the numbers, or download a finished spreadsheet — whatever the task needs, it's all in one place.
Guides
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To merge two columns in Excel, type =A2&" "&B2 in C2 and press Enter.