සා/පෙළ ගණිතය 2012 ප්‍රශ්න පත්‍රය

Base angle of an isosceles triangle

Area of a rectangle

Add two decimals

Simplify by collecting like terms

Number shown by tally marks

Shade the intersection of two overlapping sets

Write the inequality shown on a number line

Convert grams to kilograms

Triangle area as a fraction of a trapezium

Product of two square roots

Solve an index equation after multiplying powers

Angles in a triangle cut by a line parallel to its base

Fraction of students in a mark range from a histogram

Tick true statements about multiplying by numbers above/below one

Find a column matrix M from a matrix equation

Angle using parallel lines and triangle angle sums

Market price per share from investment and nominal value

Make n the subject of the AP term formula

Angle formed by extending sides of a regular hexagon

Express lg x in terms of b

Cone base radius from a quarter-circle net

Shaded L-shape as a fraction of a square

Angle at the centre from a chord and its perpendicular

Remaining fill time after one tap is closed

Angle from central angles and cyclic quadrilateral

Value of a sum of squared ratios from their sum

Sketch loci to place a tree near two walls

Positive integers satisfying two equations

Simplify a mixed-fraction expression; electricity bill by tiered unit rates

Garden of rectangle plus semicircle with surrounding path: areas, plan, tiles

School ratio of girls to boys, change in ratio; simple interest loan

Tree diagram for a rotating wheel; probability with a die and coin

Stem-and-leaf: range, median; grouped table, midpoints, frequency polygon

Selling price with profit; new cost price; percentage rise; rates percentage

Graph of y=6-(x+1)^2: max, axis, interval y>2, roots, new function

Equation with algebraic fractions; wire rectangle gives a quadratic, solve

Angle of depression and height by trig ratios; bearings sketch, scale, bearing

Ice cream and yoghurt prices from simultaneous equations; difference of squares factorising

Cylinder minus hemisphere equals four spheres; log-table simplification

Heights of cone figures as an AP; wire needed; GP first term

Construct right triangle, angle bisector, inscribed-type circle, tangent; area ratio

Grouped brick production: modal class, mean, test an order, extra days

Venn diagram of book types: shade, count, fraction, probability

Square with right angle at midpoint: congruence, equal angles, similar triangles, lengths

Cyclic quadrilateral: congruent triangles, equal angles, midpoint theorem result