Bac G3 Niger common mistakes
Bac G3 Niger · Understand the traps and how to avoid them.
In a journal entry, the candidate records the VAT (TVA) amount inside the same account as the base (e.g., debits 1 180 000 FCFA to a charge account instead of 1 000 000 FCFA of charge plus 180 000 FCFA of deductible TVA), so the trial balance no longer balances the TVA accounts.
Candidates memorize the debit/credit direction of purchases but never internalize that Niger's TVA is a separate collectible/deductible account (443/445), so they treat the invoice total as one figure. Under exam pressure they skip the sub-calculation entirely.
What to do instead
Adopt a fixed three-line ritual before writing any entry: identify HT base, compute TVA at the correct rate (19% standard in Niger), compute TTC, then post three lines - charge (debit), TVA deductible (debit), supplier (credit). Practise 15 mixed purchase/sale invoices until the ritual is automatic, and always verify credit total = debit total on the entry itself.
The candidate cannot close the books: they leave the trial balance (balance) unequal and simply write 'écart' or force the difference into a suspense account instead of locating the error.
Weak drilling on the error-hunting procedure (difference divisible by 2 = wrong side; by 9 = transposition or inversion) and no habit of checking the balance at each posting stage. Time pressure makes forcing the balance feel faster than finding the fault.
What to do instead
Memorize the two divisibility tests and apply them mechanically: difference ÷ 2 means an amount posted on the wrong side; difference ÷ 9 means a digit transposition. Then drill a set of 10 deliberately corrupted balances and find each error within 5 minutes, documenting the reasoning in one line each.
When asked to compute a product's unit cost or a period result, the candidate mixes fixed and variable costs, or allocates all indirect costs to a single product, producing a unit cost that ignores the treatment of fixed costs under direct costing versus full costing.
The distinction between charges variables/fixes and the two costing methods is taught abstractly; candidates learn formulas by rote without a mental model of what changes when activity changes, so they pick whichever formula they remember first.
What to do instead
Build a one-page comparison table: direct costing (only variable costs in unit cost, fixed costs to the period result) versus full costing (fixed costs absorbed by production). Then redo three exercises twice - once under each method - and explicitly state in writing which method the question demands before calculating.
On a break-even (seuil de rentabilité) question, the candidate computes the break-even point in value but reports it in units, or forgets to use the contribution margin ratio and instead divides total fixed costs by the selling price.
Formulas are memorized as strings without units attached, and candidates do not check whether the question asks for quantity, turnover, or date. Dividing by price instead of unit contribution margin is the classic slip.
What to do instead
Always write the formula with units: SR (value) = fixed costs ÷ contribution margin ratio; SR (quantity) = fixed costs ÷ unit contribution margin; point mort = SR ÷ annual turnover × 12 months. After each answer, sanity-check the unit (FCFA vs units vs months) and verify that at the break-even quantity, contribution margin exactly equals fixed costs.
In commercial calculations, the candidate confuses the calculation base: applying a markup (taux de marque) as if it were a margin on cost price, or computing a discount on the already-discounted price instead of on the original price.
The words 'marge', 'marque', 'remise', 'escompte' are treated as synonyms, and the candidate plugs numbers into whichever formula surfaces first. Cascading discounts are read as sequential percentages on the reduced amount.
What to do instead
Fix the definitions: margin rate = margin ÷ cost price; markup rate = margin ÷ selling price; a discount chain applies each rate to the original list price and the net price is list × (1−d1)(1−d2). Work 10 exercises where the question deliberately gives the margin and asks for the price, so the base must be identified before calculating.
On statistics questions, the candidate computes a mean from a grouped frequency table using class midpoints but then reports the median or the mode from the raw data, or forgets to weight by frequency at all.
Grouped data require a shift from raw-data habits, and candidates do not distinguish mean, median, and mode as different measures. Weighted computation is skipped because it takes more time.
What to do instead
Before any statistic, draw the table with columns: class, midpoint, frequency, midpoint × frequency. Compute the mean only from the total of that last column divided by total frequency. For the median, locate the cumulative frequency column and the median class before applying the interpolation formula. Do five full tables end to end.
In monetary economics, the candidate defines inflation as 'prices going up' and then, asked for causes or consequences, lists only demand-pull, ignoring monetary creation, cost-push, and the distinction between inflation, deflation, and disinflation.
Definitions are learned as slogans from revision sheets rather than as mechanisms. The candidate never links money supply growth to the quantity equation, so the monetary origin of inflation is not available at exam time.
What to do instead
Write a structured fiche for each concept: definition, measurement (CPI), causes (demand-pull, cost-push, monetary), consequences (purchasing power, savings, exports), and remedy. Anchor the monetary link with MV = PT and be able to explain in three sentences how excess money creation raises prices.
The candidate treats the commercial lease or the employment contract as a single undifferentiated topic: they answer a labour-law question with civil-contract rules (e.g., applying the general law of contract to a dismissal), or ignore that the employment contract in Niger is governed by the Labour Code and collective agreements.
The exam spans both civil/commercial law and labour law, and candidates revise them together without marking the boundary. They default to the general contract rules they learned first.
What to do instead
Build a boundary table: subject, governing text, mandatory rules, jurisdiction. For dismissal, memorize the required procedure (written notification, stated grounds, notice, severance) and the role of the labour inspector, and practise identifying from a short scenario which body of law applies before writing the answer.
In tax questions, the candidate computes corporate income tax (impôt sur les bénéfices) on accounting profit without applying the fiscal reintegrations and deductions, or forgets the minimum tax floor, producing a taxable base that ignores the fiscal result.
The gap between accounting result and fiscal result is the hardest idea in the tax syllabus; candidates revise rates but not the reconciliation, and they have no habit of checking which is higher, the computed tax or the minimum tax.
What to do instead
Always produce a two-column reconciliation: accounting result, plus non-deductible charges (reintegrations), minus exempt or already-taxed income (deductions), equals fiscal result. Then compute tax on that base and compare it with the minimum tax; retain the higher. Drill five reconciliation tables with mixed items (fines, provisions, dividends).
In the English and written-expression sections, the candidate writes long, complex sentences translated word-for-word from French, producing errors in tense, articles, and word order, and in French composition they answer the topic without a plan, mixing register and repeating the same idea.
Candidates translate mentally from French under time pressure instead of using structures they control, and they treat the writing task as spontaneous speech rather than a planned text. No time is reserved for rereading.
What to do instead
For English, practise a bank of 20 short controlled structures (present perfect vs simple past, articles, comparatives) and write answers using only structures you can verify; reserve the last 5 minutes to reread for tense and agreement. For French, impose a 5-minute plan (introduction, two or three argued parts, conclusion) and one rereading pass for agreement and register before handing in.