From: Subject: Exponents (multiple choice questions) Date: Tue, 28 Dec 2004 19:09:00 -0500 MIME-Version: 1.0 Content-Type: multipart/related; type="text/html"; boundary="----=_NextPart_000_0013_01C4ED10.B0283060" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0013_01C4ED10.B0283060 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Location: http://www.sec.org.za/maths/mmcexpo.html =EF=BB=BF Exponents
Multiple Choice Test
Indicate the correct answer by = clicking=20 on the button next to the numbers 1, 2, 3 or 4. There is only one = correct=20 answer per question. After you have answered all = multiple=20 choice questions compare your choices with the correct answers.=20

Exponents

Click on the button next to the term you think is the = correct=20 answer.=20

1.)  Given that (1/x)2 = =3D 0.04,=20 find the value of x.=20
    1   1/5
    2   1/2
    3   5
    4   10
    2 =3D 1/25 =3D 0.04")' = type=3Dbutton value=3DExplanation>
2.)  Given that 3x - 1 =3D = 243, find the=20 value of x.=20
    1   4
    2   5
    3   6
    4   82
    (6 - 1) =3D 35 =3D 243")' = type=3Dbutton value=3DExplanation>
3.) If x + 121,121 =3D 121,121,121, then = x =3D=20
    1   1.21 =C3=97 109
    2   1.21 =C3=97 108
    3   1.21 =C3=97 107
    4   1.21 =C3=97 = 106
    =3D = 1,21 x 108 + 121.121
    hence the answer is = B.")' type=3Dbutton value=3DExplanation>

4.) Evaluate    3Dmmcexpo1.gif=20   , writing your answer in standard=20 form.
    1   2,5 x 10-1
    2   2,5 x 10-7
    3   2,5 x 10-9
    4   2,5 x=20 10-11

    =3D 250 x 10-6 = x 10-3
    =3D 250 x 10-6 = - 3
    =3D 250 x 10-9
    =3D 2,5 = x 10-7")' type=3Dbutton value=3DExplanation>
5.) The value of 43 = x=20 163 is:=20
    1   646
    2   86
    3   48
    4   213
    3 x 163 = =3D
    43 x (42)3 =3D =
    43 + 2 =C2=B7 3 =3D
    43 + 6 =3D = 49
    49 =3D 86
    Thanks to Suparna = Roy I can now supply the last part of the explanation:
    49 = =3D (22)9 =3D 218 =3D = (23)6 =3D 86")' type=3Dbutton = value=3DExplanation>
6.) Simplify  3D""=20:=20
    1   p-36
    2   p-12
    3   0
    4   1
    rewritten is
    =3D (p-7/p-3 = x p4)2
    =3D (p-7 + 3 = x p4)2
    =3D (p-4 = x p4
    =3D p-4 + 4
    =3D = p0 =3D 1")' type=3Dbutton value=3DExplanation>
7.) Simplify     3Dmmcexpo3.gif=20=20
    1   p-6
    2   p11
    3   p22
    4   p121

    =3D (p-3 = x p7)2  3D = (p-10 x = p3)2
    =3D (p4)2  3D = (p-7)2
    =3D p8  3D = p-14
    =3D p8 + 14 =3D p22")' = type=3Dbutton value=3DExplanation>
8.) (7m2n2) =C2=B7=20 (4m3n2) =3D=20
    1   11m5n4
    2   28m5n4
    3   28m6n4
    4   28m23n22
    2n2) =C2=B7 = (4m3n2)
    =3D (4 x = 7)=C2=B7(m2 + 3)=C2=B7(n2 + 2)
    =3D = 28m5n4")' type=3Dbutton value=3DExplanation>
9.) (9ax2) =C2=B7 = (8xy2) =3D=20
    1   36axy3
    2   72ax2y2
    3   72ax3y2
    4   98ax2y2
    2)=C2=B7(8xy2)
    =3D = (9 x 8)=C2=B7(ay2x2 + 1),br> =3D = 72ax3y2")' type=3Dbutton value=3DExplanation>
10.) 3D""=20
    1   a50
    2   a45
    3   a15
    4   a10
    ")' type=3Dbutton value=3DExplanation>
Results
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