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What’s the error?
Topic 1
Quadrilaterals
Topic 2
Displaying Data
Topic 3
Fractions,
Decimals and
Percentages
What’s the error?
Topic 1 Quadrilaterals
Each of the following sentences contains a mistake.
Discover the type of mistake – a mathematical error or a spelling error? Tick the box.
Question
1. A rectangle has four acute angles.
2. A trapezium is an example
of a quadlirateral.
3. Every square is a recttangle.
4. The formula for the area of a
1
parallelogram is 2 × base × height.
5. The lengths of the diagonals of a
kite are always equal.
6. The sum of the interior angles
of any quadrilateral is 180°.
7. A paralelogram has 2 pairs
of parallel sides.
8. A square has 2 lines of symmetry.
9. The area of a rectangle with
length 6cm and breadth 2m is
12cm².
10. The diagonals of a kite cross at
right angles outside the shape.
Mathematical
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Topic 2 Displaying Data
Each of the following sentences
contains a mistake.
Discover the type of mistake – a
mathematical error or a spelling error?
Tick the box.
Question
1. A frequency diagram is a type of pie chart.
2. A key must be included when drawing any
pictagram.
3. Usually, the vertical axis is the 𝑥 – axis.
4. The scatter diagram above
shows negative correlation.
5. In a bar chart for qualitative data, there must
be gaps beetween the bars.
6. When drawing a pie chart, it is important to
remember that the sum of the angles in the
centre of the circle is 180°.
7. When drawing any histogram, the formula
for finding the frequency density is:
Frequency Density = Class Width ÷ Frequency.
8. The word “cumulative” (as seen in “Cumulative
Frequency Diagram”) refers to a type of
multiplication.
9. It is important to rememmber to add a title to
any chart or diagram.
10. When drawing any chart or diagram, you
must always use the same scale (e.g. 1 big
square of graph paper = 10 units) on the
horizontal and vertical axes.
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Topic 3 Fractions, Decimals & Percentages
Each of the following sentences contains a mistake.
Discover the type of mistake – a mathematical error or a spelling error? Tick the box.
Mathematical
error
Question
1. As a decimal, 46% is equal to 4.6.
2. In any fraction, the denominator is
the number at the top of the
fraction and the numerator is the
number at the bottom of the
fraction.
3. To multiply two fractions, we need
to multiply the numerators and
multiply the denominators, then
simplify if posible.
4. To add two fractions, we need to
add the numerators and add the
denominators, then simplify if
possible.
5. Three quarters of an hour
is equal to 0.45 hours.
4
6. The fraction 5 is equal to the
decimal 0.4.
7. 20 out of 25 in an exam
gives the percentage 75%.
3
8. The mixed number 4 5 is equivelent
to the top-heavy fraction
23
.
5
9. When adding seven hundredths
to eight thousandths we get the
answer 0.78.
9
10. The numbers 46% , 20 , 0.43
are written in ascending order.
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