igureMaths
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40 questions at your level
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Level 1
Level 2
Level 3
Level 4
Level 5
Substituting into formulae
15 questions
Lesson
Not started
Mark as done
The formula for converting a temperature
C
C
C
(in °C) to
F
F
F
(in °F) is
F
=
9
C
5
+
32
F = \dfrac{9C}{5} + 32
F
=
5
9
C
+
32
(a)
Work out the value of
F
F
F
when
C
=
−
40
C = -40
C
=
−
40
.
(b)
Work out the value of
C
C
C
when
F
=
212
F = 212
F
=
212
.
●●●●●
Level 5
5 marks
Start
→
Rearranging formulae
16 questions
Lesson
Not started
Mark as done
Make
x
x
x
the subject of
T
=
2
x
−
5
\;T = 2\sqrt{x} - 5
T
=
2
x
−
5
●●●●●
Level 5
3 marks
Start
→
Mark as done
Make
x
x
x
the subject of
y
=
12
x
+
3
\;y = \dfrac{12}{x + 3}
y
=
x
+
3
12
●●●●●
Level 5
3 marks
Start
→
Mark as done
Make
L
L
L
the subject of
T
=
2
π
L
g
\;T = 2\pi\sqrt{\dfrac{L}{g}}
T
=
2
π
g
L
●●●●●
Level 5
3 marks
Start
→
Changing the subject when it appears twice
11 questions
Lesson
Not started
Mark as done
Make
x
x
x
the subject of
y
=
3
x
+
2
x
−
4
\;y = \dfrac{3x + 2}{x - 4}
y
=
x
−
4
3
x
+
2
●●●●●
Level 5
3 marks
Start
→
Mark as done
Make
p
p
p
the subject of
p
−
q
=
p
q
\;p - q = pq
p
−
q
=
pq
●●●●●
Level 5
3 marks
Start
→
Mark as done
y
=
5
x
−
1
x
+
3
y = \dfrac{5x - 1}{x + 3}
y
=
x
+
3
5
x
−
1
(a)
Make
x
x
x
the subject.
(b)
Hence find the value of
x
x
x
when
y
=
4
y = 4
y
=
4
●●●●●
Level 5
4 marks
Start
→
Mark as done
Make
x
x
x
the subject of
T
=
a
+
x
x
\;T = \sqrt{\dfrac{a + x}{x}}
T
=
x
a
+
x
where
x
x
x
and
T
T
T
are positive.
●●●●●
Level 5
4 marks
Start
→
Mark as done
Make
x
x
x
the subject of
v
=
u
−
2
x
x
+
5
\;v = \dfrac{u - 2x}{x + 5}
v
=
x
+
5
u
−
2
x
●●●●●
Level 5
4 marks
Start
→
Mark as done
y
=
2
x
+
7
x
−
1
y = \dfrac{2x + 7}{x - 1}
y
=
x
−
1
2
x
+
7
(a)
Make
x
x
x
the subject.
(b)
Hence find the value of
x
x
x
when
y
=
5
y = 5
y
=
5
.
●●●●●
Level 5
5 marks
Start
→