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BECE Mathematics 2015 Paper
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© africaexams.com
Question : 7
Total: 40
If
p
×
q
×
r
=
1197
, and
p
=
19
,
q
=
3
, find
r
.
21
49
57
61
Validate
Solution:
p
×
q
×
r
=
1197
Make
r
the subject.
Divide both sides of the equation by
p
×
q
p
×
q
×
r
p
×
q
=
1197
p
×
q
r
=
1197
p
×
q
But
p
=
19
and
q
=
3
r
=
1197
19
×
3
=
21
Note: 19 divides 1197, 63 times and 3 divides 63, 21 times.
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