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Practice

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All Tracks IB Analyst Consulting Case Big 4 Audit FP&A Data Analyst

Array Formulas

6 problems

Generate Months 1–12 with SEQUENCE

FILTER the Active Employees

Sorted Unique Departments via SORT(UNIQUE(...))

Debug — BYROW Returns Wrong Array Shape

Refactor — INDEX/MATCH/LARGE Ranking → SORTBY

medium

Optimize — Replace 16 SUMIFS Cells with One Spill

Conditional Formatting

6 problems

Flag Overdue Invoices

Highlight the Top 3 Reps by Revenue

Debug — Duplicate Flag Misses Whitespace Variants

KPI Score Color Bands (Green / Yellow / Red)

SLA Escalation Flag (Open + High + Past SLA)

Match-Target — Reverse-Engineer the Ticket Triage Rule

Data Cleaning

12 problems

Clean a Roster — TRIM + PROPER

Currency Strings → Numbers

Strip Phone Numbers Down to Digits

Standardize Product Codes — UPPER

Unify Mixed Date Formats to YYYY-MM-DD

Debug — Negatives Lost in SUBSTITUTE Chain

Find the Error — COUNTIF Conflates Case-Distinct Records

Optimize — 5-Deep SUBSTITUTE → REGEXREPLACE

Refactor — Name Parser with LET

Match-Target — Reverse-Engineer the Roster Cleaner

Parse a Single-Column Address into Components

Cross-CRM Deduplication (Case + Whitespace Invariant)

Date Functions

12 problems

Days Until Each Employee's Next Work Anniversary

Fiscal Quarter (Apr-Start) From Each Transaction Date

Day-of-Week Name From Each Date

Format Each Date as "Mmm YYYY"

Years of Tenure as of Jan 1, 2026

Debug — Subscription Renewal Lands a Month BEFORE Start

Find the Error — Tenure Calc Off by One for Leap-Day Hires

Optimize — Hand-Rolled Weekday Counter → NETWORKDAYS

Refactor — Quarter-End Date with EOMONTH + LET

Reproduce the Tenure-Cohort Headcount Chart

Trailing-30-Day Revenue for Every Transaction Date

Estimated Delivery: WORKDAY + Region Lead-Time + Holidays

LET / LAMBDA

3 problems

First LAMBDA — Define Double(x) Inline

LAMBDA — FizzBuzz in One Cell

LAMBDA + LET — Tax Bracket Engine via MIN/MAX Clamps

Text Functions

12 problems

Pull the Domain Out of an Email Column

Convert Article Titles to URL Slugs

Left-Pad SKU Numbers to 6 Digits

Anonymize Last Names to First-Initial

Split Compound SKU into Four Columns

Debug — First-Word Extractor Includes the Trailing Space

Find the Error — Email Builder Skips a LOWER

Optimize — IF-Chain → TEXTJOIN(ignore_empty)

Refactor — Last-First Builder with LET

Match-Target — Reverse-Engineer the Employee Citation

Pull the Service Name Out of a Pipe-Delimited Log Line

Redact PII (Email + Phone + SSN) From Free Text