සා/පෙළ ගණිතය 2011 ප්‍රශ්න පත්‍රය

Multiply two decimals

Angle with a transversal crossing parallel lines

Loss when selling below cost

Subtract algebraic fractions with a common denominator

Convert litres to millilitres

Least popular sport from a pie chart

Probability of an odd number on a die

Perimeter of a triangle with algebraic sides

Fraction of a job done by two workers in two days

Pick expressions that simplify to 4y

Exterior angle of a pentagon from the others

Time to fill half a tank from time for two-thirds

Mode and range of a small data set

Factorise using difference of two squares and grouping

Marked price from selling price after a discount

Angle in a semicircle from a central angle

Make s the subject of a kinematics formula

Evaluate a combination of logarithms

Gradient and equation of a line through two points

Reason two diagonals of a regular hexagon are equal

Radius where circumference and area are numerically equal

Solve a linear inequality and show it on a number line

Angle in cyclic quadrilateral via tangent-chord theorem

Map scale: real distance for 1 cm and map length for 250 m

Segment length from two equiangular right triangles

Rectangle area inside a quadrant using Pythagoras

Sketch loci to locate a point near a road and a tree

Consecutive integers with a square sum and a cube sum

Fractions of mangoes spoilt and sold; income; buying price from profit

Netball court perimeter and area; semicircular goal circles; remaining area

Business partners' ratio and profit share; currency conversion

Tree diagram for a two-lap game; complement of a union of sets

Rainfall data: extremes, frequency and cumulative tables, ogive, median

Compare dividend income from shares with fixed deposit interest; rates

Read a given parabola; roots form; write quadratic and its minimum

Equation with algebraic fractions; sheet area gives quadratic, solve by completing square

Fruit prices by simultaneous equations; unknowns from a matrix equation

Advert durations: modal class, mean, time for 100 adverts, profit

Tower height and wire angle by trig; bearings sketch and surd distance

Theatre seat rows as an AP: nth term, sum, test a claim; GP for fungus area

Construct a 60° angle, bisector, circle touching both arms, tangent from B

Midpoint theorem, congruence, parallelogram, equal lengths and equal areas

Two intersecting circles: angles in terms of x with reasons; perpendicular radii

Venn diagram of students, sports and girls: shade, count, form an equation

Cone volume, melting into spheres; log-table simplification