6th Grade IAR Math Practice Test Questions

B. \( x = \frac{A}{13}\)

C. \( x=A+13\)

D. \( x=A-13\)

3- By what factor did the number below change from the first to the fourth number?
\(8, 104, 1352, 17576\)

A. \(13\)

B. \(96\)

C. \(1456\)

D. \(17568\)

4- \(170\) is equal to …

A. \( -20-(3×10)+(6×40)\)

B. \(((\frac{15}{8})×72 )+ (\frac{125}{5}) \)

C. \(((\frac{30}{4} + \frac{15}{2})×8) – \frac{11}{2} + \frac{222}{4}\)

D. \(\frac{481}{6} + \frac{121}{3}+50\)

5- The distance between the two cities is \(3,768\) feet. What is the distance between the two cities in yards?

A. \(1,256 yd\)

B. \(11,304 yd\)

C. \(45,216 yd\)

D. \(3,768 yd\)

6- Mr. Jones saves \($3,400\) out of his monthly family income of \($74,800\). What fractional part of his income does Mr. Jones save?

A. \(\frac{1}{22}\)

B. \(\frac{1}{11}\)

C. \(\frac{3}{25}\)

D. \(\frac{2}{15}\)

7- What is the lowest common multiple of \(12\) and \(20\)?

A. \(60\)

B. \(40\)

C. \(20\)

D. \(12\)

8- Based on the table below, which expression represents any value of \(f\) in terms of its corresponding value of \(x\)?

A. \(f=2x-\frac{3}{10}\)

B. \(f=x+\frac{3}{10}\)

C. \(f=2x+2 \frac{2}{5}\)

D. \(2x+\frac{3}{10}\)

9- \(96 kg\) \(=\)…?

A. \(96 mg\)

B. \(9,600 mg\)

C. \(960,000 mg\)

D. \(96,000,000 mg\)

10- Calculate the approximate area of the following circle. (the diameter is \(25\))

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A. \(78\)

B. \(491\)

C. \(157\)

D. \(1963\)

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Answers:

2- B
The area of the trapezoid is: area= \(\frac{(base 1+base 2)}{2})×height= ((\frac{10 + 16}{2})x = A\)
\( →13x = A→x = \frac{A}{13}\)

3- A
\(\frac{104}{8}=13, \frac{1352}{104}=13, \frac{17576}{1352}=13\)
Therefore, the factor is \(13\).

4- C
Simplify each option provided.
\( A. -20-(3×10)+(6×40)=-20-30+240=190\)
\( B. (\frac{15}{8})×72 + (\frac{125}{5}) =135+25=160\)
\(C. ((\frac{30}{4} + \frac{15}{2})×8) – \frac{11}{2} + \frac{222}{4} = ((\frac{30 + 30}{4})×8)- \frac{11}{2}+ \frac{111}{2}=(\frac{60}{4})×8) + \frac{100}{2}= 120 + 50 = 170\)

this is the answer
\(D. \frac{481}{6} + \frac{121}{3}+50= \frac{481+242}{6}+50=120.5+50=170.5\)

5- A
\(1\) \(yard\) \(= \)\(3 feet\)
Therefore, \(3,768 ft × \frac{1 \space yd }{3 \space ft}=1,256 \space yd\)

6- A
\(3,400\) out of \(74,800\) equals to \(\frac{3,400}{74,800}=\frac{17}{374}=\frac{1}{22}\)

7- A
Prime factorizing of \(20=2×2×5\)
Prime factorizing of \(12=2×2×3\)
\(LCM\)\(=2×2×3×5=60\)

8- C
Plug in the value of \(x\) into the function \(f\). First, plug in \(3.1\) for \(x\).
\(A. f=2x-\frac{3}{10}=2(3.1)-\frac{3}{10}=5.9≠8.6\)
\(B. f=x+\frac{3}{10}=3.1+\frac{3}{10}=3.4≠10.8\)
\(C. f=2x+2 \frac{2}{5}=2(3.1)+2 \frac{2}{5}=6.2+2.4=8.6 \)
This is correct!
Plug in other values of \(x. x=4.2\)
\(f=2x+2\frac{2}{5} =2(4.2)+2.4=10.8 \)
This one is also correct.
\(x=5.9\)
\(f=2x+2 \frac{2}{5}=2(5.9)+2.4=14.2 \)
This one works too!
\(D. 2x+\frac{3}{10}=2(3.1)+\frac{3}{10}=6.5≠8.6\)

9- D
\(1 kg\)\(=\) \(1000 g\) and \(1 g\) \(=\) \(1000 mg\)
\(96 kg\)\(=\) \(96\) \(×\) \(1000 g\) \(=\)\(96\) \(×\) \(1000 \)\(×\) \(1000\) \(=\)\(96,000,000 mg\)

10- B
The diameter of a circle is twice the radius. Radius of the circle is \(\frac{25}{2}\).
Area of a circle = \(πr^2=π(\frac{25}{2})^2=156.25π=156.25×3.14=490.625≅491\)

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