WEEKDAY and WORKDAY in Google Sheets - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the formula to get the weekday number of the date in cell A1.

Google Sheets

=WEEKDAY([1])

Drag options to blanks, or click blank then click option'

AA1

B1

C"A1"

DDATE(2023,1,1)

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number like 1 instead of a cell reference.

Putting the cell reference in quotes like "A1" which makes it text.

The WEEKDAY function needs a cell reference or date value. Using A1 correctly points to the date in that cell.

2fill in blank

medium

Complete the formula to find the date 5 workdays after the date in cell B2.

Google Sheets

=WORKDAY([1], 5)

Drag options to blanks, or click blank then click option'

A5

BTODAY()

C"B2"

DB2

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number like 5 as the start date.

Putting the cell reference in quotes which makes it text.

The WORKDAY function needs a start date as the first argument. B2 correctly refers to the start date cell.

3fill in blank

hard

Fix the error in the formula to get the weekday number of the date in cell C3 with Monday as day 1.

Google Sheets

=WEEKDAY(C3, [1])

Drag options to blanks, or click blank then click option'

A1

B3

C2

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 which starts the week on Sunday.

Using 0 or 3 which are invalid or different numbering schemes.

Using 2 as the second argument makes WEEKDAY count Monday as 1, Tuesday as 2, and so on.

4fill in blank

hard

Fill both blanks to create a dictionary of words and their lengths, but only for words longer than 4 letters.

Google Sheets

{word: [1] for word in words if len(word) [2] 4}

Drag options to blanks, or click blank then click option'

Alen(word)

B>

C<

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using word instead of len(word) for the value.

Using < instead of > in the condition.

The dictionary maps each word to its length using len(word). The condition len(word) > 4 filters words longer than 4 letters.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys, values from data, and only include values greater than 0.

Google Sheets

result = [1]: [2] for k, v in data.items() if v [3] 0}

Drag options to blanks, or click blank then click option'

Ak.upper()

Bv

C>

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Using k instead of k.upper() for keys.

Using < instead of > in the condition.

Using k instead of v for values.

The keys are uppercase using k.upper(). The values are v. The condition v > 0 filters positive values.

Practice

1. What does the WEEKDAY function return when given a date in Google Sheets?

easy

A. The name of the month for that date

B. The date of the next working day

C. The number of days between two dates

D. A number representing the day of the week for that date

Solution

1. Step 1: Understand the purpose of WEEKDAY

   The WEEKDAY function returns a number from 1 to 7 representing the day of the week for a given date.

2. Step 2: Compare options with function behavior

   Only a number representing the day of the week for that date correctly describes this behavior; others describe unrelated functions.

3. Final Answer:

   A number representing the day of the week for that date -> Option D

4. Quick Check:

   WEEKDAY = day number [OK]

Hint: WEEKDAY gives day number, not names or intervals [OK]

Common Mistakes:

• Thinking WEEKDAY returns the month's name
• Confusing WEEKDAY with date difference functions
• Assuming WEEKDAY returns the next workday

2. Which of the following is the correct syntax to add 5 working days to a date in cell A1, skipping weekends in Google Sheets?

easy

A. =WEEKDAY(A1 + 5)

B. =WORKDAY(A1, 5)

C. =WORKDAY(5, A1)

D. =WORKDAY(A1 + 5)

Solution

1. Step 1: Recall WORKDAY function syntax

   WORKDAY(start_date, days, [holidays]) adds working days to start_date, skipping weekends.

2. Step 2: Check each option's syntax

   =WORKDAY(A1, 5) correctly uses WORKDAY with start_date A1 and 5 days. Others misuse argument order or functions.

3. Final Answer:

   =WORKDAY(A1, 5) -> Option B

4. Quick Check:

   WORKDAY(start_date, days) [OK]

Hint: WORKDAY(start_date, days) adds workdays skipping weekends [OK]

Common Mistakes:

• Swapping arguments in WORKDAY
• Using WEEKDAY instead of WORKDAY to add days
• Adding days directly without WORKDAY

3. If cell A1 contains the date 2024-06-14 (a Friday), what will =WORKDAY(A1, 3) return?

medium

A. 2024-06-19 (Wednesday)

B. 2024-06-18 (Tuesday)

C. 2024-06-17 (Monday)

D. 2024-06-20 (Thursday)

Solution

1. Step 1: Identify the start date and days to add

   Start date is Friday, June 14, 2024. We add 3 working days skipping weekends.

2. Step 2: Count 3 working days skipping weekend

   Day 1: Monday, June 17
   Day 2: Tuesday, June 18
   Day 3: Wednesday, June 19

3. Final Answer:

   2024-06-19 (Wednesday) -> Option A

4. Quick Check:

   WORKDAY skips weekends, so 3 workdays after Friday is Wednesday [OK]

Hint: Count workdays skipping Sat/Sun after start date [OK]

Common Mistakes:

• Counting weekend days as workdays
• Adding days directly without WORKDAY
• Misidentifying the weekday of the start date

4. The formula =WORKDAY(A1, 10, C1:C3) returns an error. What is the most likely cause?

medium

A. WORKDAY cannot accept a range for holidays

B. The second argument must be a date, not a number

C. The holidays range C1:C3 contains invalid dates

D. The start date in A1 is not a valid date

Solution

1. Step 1: Understand WORKDAY arguments

   WORKDAY(start_date, days, [holidays]) expects holidays as valid dates in a range.

2. Step 2: Identify common error with holidays

   If holidays range contains invalid or text values, WORKDAY returns an error.

3. Final Answer:

   The holidays range C1:C3 contains invalid dates -> Option C

4. Quick Check:

   Invalid holiday dates cause WORKDAY errors [OK]

Hint: Check holiday dates for validity if WORKDAY errors [OK]

Common Mistakes:

• Assuming days argument must be a date
• Thinking WORKDAY can't accept holiday ranges
• Ignoring invalid or text values in holidays

5. You want to find the weekday number of the date that is 7 working days after 2024-06-10, excluding weekends and the holidays in range B1:B2. Which formula correctly does this?

hard

A. =WEEKDAY(WORKDAY(DATE(2024,6,10), 7, B1:B2))

B. =WORKDAY(WEEKDAY(DATE(2024,6,10)), 7, B1:B2)

C. =WEEKDAY(DATE(2024,6,10) + 7)

D. =WORKDAY(DATE(2024,6,10), 7) + WEEKDAY(B1:B2)

Solution

1. Step 1: Calculate the date 7 working days after June 10, 2024

   Use WORKDAY with start date DATE(2024,6,10), days 7, and holidays B1:B2 to skip weekends and holidays.

2. Step 2: Find the weekday number of the resulting date

   Wrap the WORKDAY result inside WEEKDAY to get the day number of that date.

3. Final Answer:

   =WEEKDAY(WORKDAY(DATE(2024,6,10), 7, B1:B2)) -> Option A

4. Quick Check:

   WORKDAY then WEEKDAY gives weekday number after skipping holidays [OK]

Hint: Use WORKDAY inside WEEKDAY to get weekday number after workdays [OK]

Common Mistakes:

• Using WEEKDAY before WORKDAY
• Adding days directly ignoring holidays
• Trying to add WEEKDAY results to dates