Excel BI - Excel Challenge 787

excel-challenges
excel-formulas
🔰 List the Question No & Question with the correct option and answer.
Published

March 24, 2026

Illustration for Excel BI - Excel Challenge 787

Challenge Description

🔰 List the Question No & Question with the correct option and answer.

Solutions

library(tidyverse)
library(readxl)

input = read_excel("Excel/700-799/787/787 Right Answer Selection.xlsx", range = "A2:C14")
test  = read_excel("Excel/700-799/787/787 Right Answer Selection.xlsx", range = "E2:H5")

r1 = input %>% filter(str_detect(No, "^[0-9]+$") | Correct == "Y") %>% select(-Correct)

result = bind_cols(
  filter(r1, str_detect(No, "^[0-9]+$")),
  filter(r1, !str_detect(No, "^[0-9]+$"))
) %>% set_names(colnames(test)) %>% mutate(No = as.integer(No))

all.equal(result, test)
  • Logic: Read the workbook ranges needed for the challenge; Derive the required intermediate columns.
  • Strengths: The code maps the workbook rule into a compact, reproducible pipeline.
  • Areas for Improvement: The solution assumes the workbook layout and selected ranges remain stable, so any structural change in the sheet would require small adjustments.
  • Gem: The elegant part is how little code is needed once the correct intermediate representation is chosen.
import pandas as pd

path = "700-799/787/787 Right Answer Selection.xlsx"

input = pd.read_excel(path, usecols="A:C", skiprows=1, nrows=13)
test = pd.read_excel(path, usecols="E:H", skiprows=1, nrows=3).rename(columns=lambda col: col.replace('.1', ''))

r1 = input[input['No'].astype(str).str.match(r'^\d+$') | (input['Correct'] == 'Y')].drop(columns=['Correct'])
part1 = r1[r1['No'].astype(str).str.match(r'^\d+$')].reset_index(drop=True)
part2 = r1[~r1['No'].astype(str).str.match(r'^\d+$')].reset_index(drop=True)
result = pd.concat([part1, part2], axis=1)
result.columns = test.columns
result['No'] = result['No'].astype(int)

print(result.equals(test))

The Python version mirrors the same workbook logic with a concise, direct implementation.

Difficulty Level

Easy / Medium

The business rule is clear, though the workbook still needs a few transformation steps to reach the expected output.