Practice Questions
Concept Explanation
Two discounts d₁% and d₂% on MP are equivalent to a single discount:
d = d₁ + d₂ − (d₁ × d₂) / 100
Successive discounts are not additive — 10% + 20% ≠ 30%.
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Q1 Easy
10% and 20% discounts together equal:
Explanation10 + 20 − 2 = 28%. -
Q2 Easy
Equivalent of 15% and 10% is:
Explanation15 + 10 − 1.5 = 23.5%. -
Q3 Medium
Single discount equivalent to 20% and 20% is:
Explanation20 + 20 − 4 = 36%. -
Q4 Medium
If equivalent discount is 28%, possible pair is:
Explanation10% and 20% give 28%. -
Q5 Medium
25% and 20% equivalent discount is:
Explanation25 + 20 − 5 = 40%. -
Q6 Easy
MP Rs. 1,000 with equivalent 30% discount gives SP:
ExplanationSP = 700. -
Q7 Hard
5%, 10%, and 20% successive discounts approximate equivalent:
ExplanationRemaining 0.95×0.9×0.8 = 0.684 → 31.6%. Closest C.
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Q8 Medium
Equivalent of 30% and 30% is:
Explanation30 + 30 − 9 = 51%. -
Q9 Hard
Which pair gives higher equivalent discount: 15%+15% or 20%+10%?
Explanation15+15 = 27.75%; 20+10 = 28%. So 20%+10% is the higher equivalent discount. -
Q10 Hard
Single 25% discount equals which successive pair?
Explanation20 + 5 − 1 = 24% close; 10+15=23.5. 20+5=24% nearest to 25% among reasonable pairs — actually 25% alone. Best: none exact; 20%+6.25%=25%. -
Q11 Medium
Equivalent discount of 8% and 12% is:
Explanation8 + 12 − 0.96 = 19.04%. -
Q12 Easy
MP Rs. 800. Equivalent 35% discount. SP is:
ExplanationSP = 800 × 0.65 = Rs. 520. -
Q13 Medium
If d₁ = d₂ = d, equivalent is:
ExplanationStandard formula with equal discounts. -
Q14 Hard
10% + 10% + 10% successive discount equals approx:
Explanation0.9³ = 0.729 → 27.1%.
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DS1 Easy
What is the equivalent single discount?
Statement IFirst discount is 15%.
Statement IISecond discount is 20%.
ExplanationTogether: 32%. -
DS2 Medium
What is the selling price?
Statement IMP is Rs. 2,000.
Statement IIEquivalent discount is 28%.
ExplanationSP = 1440.
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DS3 Hard
Are the two discounts equal?
Statement IEquivalent discount is 36%.
Statement IIOne discount is 20%.
ExplanationCould be 20% and 20%, or other pairs — not determined. -
DS4 Medium
Is equivalent discount greater than 25%?
Statement IDiscounts are 10% and 20%.
Statement IIMP is Rs. 500.
ExplanationEquivalent 28% > 25%.