Top 10 6th Grade OST Math Practice Questions
4- B
\(-8≤5x-8<2 →\) (add 8 all sides)\(-8+8≤5x-8+8<2+8 →0≤5x<10→\) (divide all sides by 5) \(0≤x<2\) For additional educational resources,.
5- D
The ratio of boy to girls is 4:5. Therefore, there are 4 boys out of 9 students. To find the answer, first, divide the total number of students by 9, then multiply the result by 4.
\(765 ÷ 9 = 85 ⇒ 85 × 4 = 340\) For additional educational resources,.
6- A
For one hour he earns $20, then for t hours he earns $20t. If he wants to earn at least $100, therefore the number of working hours multiplied by 20 must be equal to 100 or more than 100.
\(20t≥100\) For additional educational resources,.
7- C
\((55+5)÷(12)=(60)÷(12)\)
The prime factorization of 60 is: \(2×2×3×5 \)
The prime factorization of 12 is: \( 3×4 \)
Therefore: \((60)÷(12)=(2×2×3×5)÷(3×4)\) For additional educational resources,.
8- C
For additional educational resources,.
Plug in the value of \(x\) and \(y\) and use the order of operations rule.
\(x=2\) and \(y=-1\)
\(6(2x-3y)+(3-2x)^2=6(2(2)-3(-1))+(3-2(2))^2=6(4+3)+(-1)^2 = 42+1=43\) For additional educational resources,.
9- C
\(\frac{215}{7} ≅ 30.71 ≅ 30.7\) For additional educational resources,.
10- C
\(6\%\) of the volume of the solution is alcohol. Let \(x\) be the volume of the solution.
Then: \(6\% \space of \space x = 45 \space ml ⇒ 0.06 x = 45 ⇒ x = 45 ÷ 0.06 = 750\) For additional educational resources,.
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