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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

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

INDEX / MATCH

12 problems

Product Lookup by SKU

Sector Lookup by Ticker

Manager by Employee ID (Left-Of-Key Lookup)

SKU by Product Name (Right-To-Left Lookup)

Region × Product Price Grid (Two-Way Lookup)

Debug — Lookup Range Drifts on Drag

Find the Error — Off-by-One in 2D INDEX/MATCH/MATCH

Recreate the Revenue Chart — Calendar-Order Monthly Pull

Refactor — INDEX/MATCH/MATCH → INDEX/XMATCH/XMATCH

Optimize — Tier-Band Lookup with Approximate Match

Distinct Campaigns per Region (Array Formula)

Multi-Criteria Budget Lookup

LET / LAMBDA

6 problems

Net Margin via LET-Named Revenue and Cost

First LAMBDA — Define Double(x) Inline

Refactor — Tax-Bracket Calc with LET-Named Thresholds

Optimize — % of Total per Region without Repeating the Range

LAMBDA — FizzBuzz in One Cell

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

Pivot Fundamentals

12 problems

Order Count by Month

Revenue by Region

Top 3 Products by Units Sold

Headcount by Department

Region × Product Revenue Matrix

Debug — Product Pivot Returns Zero for Every Row

Find the Error — "OR" Pivot Double-Counts Overlapping Rows

Optimize — Monthly Revenue Without a Helper Column

Refactor — Bind Pivot Ranges with LET

Reproduce the Monthly Revenue × Category Chart

Region × Quarter Revenue Aggregate

Cohort Retention — Month-Over-Month Return Rate

SUMIF / COUNTIF

12 problems

Quarterly Sales by Region

Recreate the Monthly Revenue Chart

Pipeline Total by Sales Stage

Monthly Expense Total by GL Account

Count Present Days from Attendance Log

AR Aging Buckets — Past-Due Counts

Debug — SUMIFS Returns Zero on Threshold Criteria

Find the Error — COUNTIFS Reports Zero on Live Customers

Refactor — Bind the Range Once with LET

SUMIFS vs. SUMPRODUCT — When Each Wins

Distinct Customers per Region (No Helper Column)

Cohort Revenue by Order Month (Multi-Step SUMPRODUCT)