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FEED • Stack 6KEY
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Answer Key
Stack 6
Check your answers for all five Vaults!
Vault 1
Money & Smart Spending
💼
Vault 2
Earning, Saving & Goals
📋
Vault 3
Budgeting & Money Management
🏛️
Vault 4
Banking & Digital Payments
📈
Vault 5
Growing Money & Tax
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Published by INFINTRIX | Edition 1 | 2026
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FEED • Stack 6KEY
Vault 1:
Money & Smart Spending
Activity A: Exchange Rate Math
1. $15 × 93.31 = ₹1,399.65
2. £8 × 126.58 = ₹1,012.64
3. €6 × 109.98 = ₹659.88
4. 50 × 25 = ₹1,250
5. 9,000 ÷ 93.31 = $96.45
Activity B: ₹500 Budget
Answers vary. Total = ₹500, reasonable split (e.g., 50% needs, 30% wants, 20% savings).
Activity C: Opportunity Cost
Answers vary — check that students identify both the choice AND the opportunity cost.
Activity D: Impulse Check
1. ✅ Planned/Needed (shoes have holes)
2. ❌ Impulse (checkout counter item)
3. ✅ Planned (next semester, during sale)
4. ❌ Impulse (Instagram ad triggered)
5. ✅ Planned/Needed (replacement)
Activity E: Quick Quiz
Q1. b) ₹1,866 ($20 × 93.31)
Q2. c) ₹7,500
Q3. b) What you give up when you choose
Q4. b) Getting enough benefit for what you pay
Q5. b) Impulse buying
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Published by INFINTRIX | Edition 1 | 2026
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Vault 2:
Earning, Saving & Goals
Activity A: P&L Statement
Total Expenses: 60+40+30+20 = ₹150
1. Revenue: 20 × 20 = ₹400
2. Total Expenses: ₹150
3. Profit: 400 − 150 = ₹250
4. Revenue: 5 × 20 = ₹100; Loss: −₹50
5. Break-even: 150 ÷ 20 = 8 bookmarks
Activity B: Profit Split
Open-ended — divide ₹800 into Re-invest / Save / Goal Fund / Give. Check total = ₹800.
Activity C: Match Terms
1→C   2→B   3→G   4→D
5→A   6→H   7→F   8→E
Activity D: Break-Even
1. 240 ÷ (10 − 2) = 30 stickers
2. 300 ÷ (20 − 8) = 25 packs
3. 100 ÷ (15 − 5) = 10 cards
4. 150 ÷ (22 − 7) = 10 bookmarks
5. 600 ÷ 12 = 50 tiffins/month
Activity E: Quick Quiz
Q1. b) Revenue − Expenses
Q2. b) Revenue equals total costs
Q3. b) SP − CP
Q4. b) Starts a business to solve a need
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Published by INFINTRIX | Edition 1 | 2026
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Vault 3:
Budgeting & Money Management
Activity A: Monthly Budget
1. Fixed: 6,000+2,500+1,200 = ₹9,700
2. Variable: 5,000+2,063+1,000 = ₹8,063
3. Savings: 25,000 − 17,763 = ₹7,237
4. Open — reduce any variable expense.
Activity B: Emergency Fund
1. 18,000 × 3 = ₹54,000
2. 25,000 × 6 = ₹1,50,000
3. (60,000 − 20,000) ÷ 5,000 = 8 months
Activity C: Fixed or Variable?
1. Fixed   2. Variable   3. Fixed
4. Variable   5. Fixed   6. Variable
Activity D: Match Terms
1→D   2→B   3→H   4→G
5→E   6→A   7→C   8→F
Activity E: Quick Quiz
Q1. b) Plan income, expenses, and savings
Q2. b) Monthly house rent
Q3. b) 3–6 months’ expenses
Q4. c) Costs that change month to month
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Published by INFINTRIX | Edition 1 | 2026
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Vault 4:
Banking & Digital Payments
Activity A: Account Opening Steps
d=1, e=2, b=3, g=4, f=5, h=6, a=7, c=8
Activity B: RBI Quiz
1. Reserve Bank of India
2. 1935
3. Sets rates, prints currency, regulates banks
4. Mumbai (Mint Road)
5. Ensures banks follow rules, like a referee
Activity C: Branch vs Online
Branch: face-to-face help, first-timers, elderly
Online: tech-savvy, short on time, remote areas
Activity D: Account Opening Form
Answers vary. Check: all fields filled, Aadhaar 12 digits, mobile 10 digits, nominee named.
Activity E: Quick Quiz
Q1. b) Visit bank with docs
Q2. b) Unified Payments Interface
Q3. b) NPCI
Q4. b) 1935
Q5. b) Virtual payment address
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Published by INFINTRIX | Edition 1 | 2026
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Vault 5:
Growing Money & Tax
Activity A: SI Calculator
1. SI=₹1,440; Total=₹9,440
2. SI=₹2,400; Total=₹17,400
3. SI=₹6,000; Total=₹26,000
4. SI=₹4,500; Total=₹54,500
5. SI=₹7,000; Total=₹32,000
Activity B: Compare the FDs
Bank A: SI=₹3,900; Total=₹33,900
Bank B: SI=₹4,200; Total=₹34,200
Post Office: SI=₹4,800; Total=₹34,800
Best: Post Office (+₹900 vs Bank A)
Activity C: FD Growth Table
6%/2yr: SI=₹3,000; Total=₹28,000
7%/3yr: SI=₹5,250; Total=₹30,250
8%/2yr: SI=₹4,000; Total=₹29,000
8.5%/5yr: SI=₹10,625; Total=₹35,625
Activity D: Word Problems
1. SI=₹27,000; Total=₹1,27,000
2. SI=₹2,520
3. Both earn ₹7,200 (same SI)
4. SI=₹40,000; Total=₹2,40,000
5. SI=₹6,000; Maturity=₹21,000
Activity E: Quick Quiz
Q1. b) Principal
Q2. b) ₹1,600
Q3. b) Education loan
Q4. b) Lock money for fixed period
Q5. b) 3%
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Published by INFINTRIX | Edition 1 | 2026