ප්රශ්න 47ම, එක් එක් ප්රශ්නය පරීක්ෂා කරන දේ සමඟ. ඕනෑම එකක් ගෙදර සර් තුළ නොමිලේ උත්සාහ කර ඔබේ පිළිතුර පරීක්ෂා කරන්න.
Customs duty as a percentage of an import value

Rs 8,000
💡 ප්රශ්නයේ අදහස: තීරු බද්ද යනු රටට ගෙන එන භාණ්ඩවල වටිනාකමෙන් ප්රතිශතයක් ලෙස අය කරන බද්දකි. අපට අවශ්ය රු. 40,000 න් 20% යි.
- 20% භාගයක් ලෙස ලියන්න: 20/100.
- ආනයනික වටිනාකමෙන් ගුණ කරන්න: 40,000 × 20/100.
- 40,000 ÷ 100 = 400 වන අතර 400 × 20 = 8,000.
- එබැවින් තීරු බද්ද රු. 8,000 කි.
✅ 20% යනු පහෙන් එකක්; 40,000 ÷ 5 = 8,000 නිසා පිළිතුර ගැළපේ.
Working in English
Customs duty is a tax on goods brought into the country, worked out as a percentage of their value. We need 20% of Rs 40,000.
- Write 20% as a fraction: 20/100.
- Multiply by the import value: 40,000 × 20/100.
- 40,000 ÷ 100 = 400, and 400 × 20 = 8,000.
- So the duty is Rs 8,000.
Solve a simple equation with the unknown in a denominator

x = 3
💡 ප්රශ්නයේ අදහස: x ඇත්තේ භාගයක හරයේය. දෙපසම x න් ගුණ කර එය ඉහළට ගෙන, සුපුරුදු ලෙස විසඳන්න.
- දෙපසම x න් ගුණ කරන්න: 6 = 2x.
- දෙපසම 2 න් බෙදන්න: x = 6 ÷ 2.
- එබැවින් x = 3.
✅ x = 3 නැවත ආදේශ කරන්න: 6 ÷ 3 = 2, එය දකුණු පැත්තට සමානයි.
Working in English
x is in the bottom of a fraction. Multiply both sides by x to bring it up, then solve as usual.
- Multiply both sides by x: 6 = 2x.
- Divide both sides by 2: x = 6 ÷ 2.
- So x = 3.
Interior angle from an exterior angle of a triangle

Number of girls from a fraction of a class

Area of a quarter-circle sector

Side of a rhombus from its perimeter

Time for a journey at uniform speed

Equation of a line from gradient and intercept
වීජීය භාග · වීජීය ප්රකාශනවල කුඩාම පොදු ගුණාකාරයAdd two algebraic fractions with unlike denominators

Identify two equal sides from angles in a triangle

Factorise a trinomial quadratic expression

Evaluate a simple logarithm expression

Choose a congruent pair from three triangles and state the case

Number in a pie-chart sector from a related sector

Best first approximation of a square root

Complete statements about diagonal and angle properties of parallelograms
වීජීය ප්රකාශනවල කුඩාම පොදු ගුණාකාරයLCM of two algebraic terms

Angle in an isosceles triangle

Perimeter of a rectangle joined to a 45-degree sector

List the elements of a set from a Venn diagram
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Solve a quadratic equation in factorised form

Number in a union from set sizes

Make a variable the subject of a simple formula

Evaluate an expression by substituting values

Fractions of lottery winnings shared and spent; remaining amount

Land plan with a semicircular pond and triangular bed: perimeter, posts, areas

Venn diagram of students who visited two places

Annual and quarterly rates with an early-payment discount

Pie chart of a harvest: fractions, angles, amounts, new chart angle

Customs duty on a vehicle; simple interest loan repayment

Graph of y = x^2 - 3: minimum, decreasing range, roots

Log equation, log-table evaluation and a log value

Volume of a cuboid tank and time to fill it
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Time for a train to pass a platform
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Simultaneous equations for two fruit prices; equal-number purchase
වීජීය ප්රකාශනවල කුඩාම පොදු ගුණාකාරය · වීජීය ප්රකාශනවල සාධකLCM of three algebraic expressions
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Factorise a trinomial quadratic expression
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Subtract algebraic fractions with opposite-sign denominators
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Construct a triangle, perpendicular bisectors and a circle through a vertex

Distance-time graph: speeds, waiting time and journey time
වර්ගජ ප්රකාශනවල සාධක · වීජීය ප්රකාශනවල සාධකFactorise a difference of squares and a trinomial
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Make m the subject of a formula
අංගසාම්යය · සමාන්තරාස්ර I · සමාන්තරාස්ර IIParallelogram with perpendiculars to a diagonal: congruence, equal segments, parallelogram
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Subset Venn diagram counts; number passing both subjects
