math-eval/TAL-SCQ5K huggingface dataset:
Problem: Which of the following is an inequality that is always true？ 
Options:
aoVal: A
content: $x \textgreater{} 1$ 
aoVal: B
content: $1 \textless{} -1$ 
aoVal: C
content: $y +1 \geq 2$ 
aoVal: D
content: $2 + 1 \geq 3$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Inequalities
Source: 其它
Problem: What is the opposite sign of \textbf{\textquotesingle$\times$\textquotesingle{}}? 
Options:
aoVal: A
content: $$+$$ 
aoVal: B
content: $$-$$ 
aoVal: C
content: $$\times $$ 
aoVal: D
content: $$\div $$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: What is $$23.4-6.75$$? 
Options:
aoVal: A
content: $$30.15$$ 
aoVal: B
content: $$17.55$$ 
aoVal: C
content: $$15.75$$ 
aoVal: D
content: $$15.65$$ 
aoVal: E
content: $$16.65$$ 
Answer: E
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Addition and Subtraction of Decimals->Addition of Decimals
Problem: Fill in the blank with the correct number.  1,1,2,3,5,8,~\uline{~~~~~~~~~~}~ 
Options:
aoVal: A
content: $$11$$ 
aoVal: B
content: $$12$$ 
aoVal: C
content: $$13$$ 
aoVal: D
content: $$14$$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Patterns in Number Sequences->The Fibonacci Sequences (Rabbit Sequences)
Source: 其它
Problem: Estimate the sum of $$298608$$ and $$7290$$ by rounding off each number to the nearest thousand first (before calculating the result). 
Options:
aoVal: A
content: $$305900$$ 
aoVal: B
content: $$305000$$ 
aoVal: C
content: $$306000$$ 
aoVal: D
content: $$307000$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Comparing, Ordering and Estimating->Estimating Large Numbers
Problem: Which of the following is an linear equation written in slope-intercept form? 
Options:
aoVal: A
content: $y=x^{2}$ 
aoVal: B
content: $3y-2=4x$ 
aoVal: C
content: $y=-\frac{x}{18}+3$ 
aoVal: D
content: $\frac{17}{y}=\frac{22}{x}$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Linear Equations with one Variable
Source: 其它
Problem: There are $15$ people coming to Laura's party.  Laura wants to prepare four meatballs, two slices of pizza, and three scoops of ice cream for each guest.  A bag (B) of meatballs contains $12$ meatballs, a pizza (P) can be cut up into $10$ slices and a tub (T) of ice cream can be divided into $5$ scoops.  Which expression shows how many bags of meatballs, pizzas and tubs of ice cream Laura must buy? 
Options:
aoVal: A
content: $3\rm B+5\rm P+9\rm T$ 
aoVal: B
content: $3\rm B+5\rm P+4\rm T$ 
aoVal: C
content: $9\rm B+3\rm P+5\rm T$ 
aoVal: D
content: $15\rm B+6\rm P+3\rm T$ 
aoVal: E
content: $5\rm B+3\rm P+9\rm T$ 
Answer: E
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Look at this sequence:  72, 70, 66, 60, 52,~\uline{~~~~~~~~~~}~,~\uline{~~~~~~~~~~}~, $\cdots$  What is the $$7\text{th}$$ number in this sequence? 
Options:
aoVal: A
content: $$48$$ 
aoVal: B
content: $$42$$ 
aoVal: C
content: $$40$$ 
aoVal: D
content: $$34$$ 
aoVal: E
content: $$30$$ 
Answer: E
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Patterns in Number Sequences->Two Grade Arithmetic Sequences
Problem: After $$1$$ comes $$3$$, after $$3$$ comes $$5$$, after $$5$$ comes $$7$$. What comes after $$7$$?  $$1$$~ ~ $$3$$~ ~ $$5$$~ ~ $$7$$~ ~ $$\cdots$$ 
Options:
aoVal: A
content: $$2$$ 
aoVal: B
content: $$4$$ 
aoVal: C
content: $$7$$ 
aoVal: D
content: $$8$$ 
aoVal: E
content: $$9$$ 
Answer: E
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Arithmetic Sequences->Concepts of Arithmetic Sequences
Problem: Eddie has $$y$$ toys. Bob has $$150$$ more than two times the number of toys Eddie has. Bob hastoys． 
Options:
aoVal: A
content: $$2y+150$$ 
aoVal: B
content: $$2(y+150)$$ 
aoVal: C
content: $$2y-150$$ 
aoVal: D
content: $$2(y-150)$$ 
Answer: A
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Problem: I'm thinking of two numbers, one of which is three times as big as the other. When I double one of my numbers and then add it to the other I get $$140$$. Which of the following cannot possibly be one of my numbers? 
Options:
aoVal: A
content: $$20$$ 
aoVal: B
content: $$28$$ 
aoVal: C
content: $$50$$ 
aoVal: D
content: $$60$$ 
aoVal: E
content: $$84$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Mixed Operations
Problem: The random variable X is normally distributed with mean 5 and standard deviation 25. The random variable Y is defined by Y = 4+2X. What are the mean and the standard deviation of Y? 
Options:
aoVal: A
content: The mean is 20 and the standard deviation is 102. 
aoVal: B
content: The mean is 20 and the standard deviation is 50. 
aoVal: C
content: The mean is 22 and the standard deviation is 102. 
aoVal: D
content: The mean is 22 and the standard deviation is 100. 
aoVal: E
content: The mean is 22 and the standard deviation is 50. 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: What is the set of solution to the equation $\sqrt{x+6}=x$ ?  $\textasciitilde$ 
Options:
aoVal: A
content: $\textbackslash{-2, 3\textbackslash}$ 
aoVal: B
content: $\textbackslash{3\textbackslash}$ 
aoVal: C
content: $\textbackslash{-2\textbackslash}$ 
aoVal: D
content: There are no solutions to the given equation. 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: A satellite that is a spinning cylinder has initial rotational inertia I\textsubscript{0}~and angular velocity w\textsubscript{0.~}Solar panels unfold from the satellite and are extended outward. The satellite then has rotational inertia I\textsubscript{f} = al\textsubscript{0} and angular velocity w\textsubscript{f} = bw\textsubscript{0,~}where a and b are constants. Which of the following is true about the constants a and b ? 
Options:
aoVal: A
content: a = l and b = 1 
aoVal: B
content: a \textgreater{} 1 and b \textless{} l 
aoVal: C
content: a \textgreater{} l and b = 1 
aoVal: D
content: a \textless{} l and b \textless{} l 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: One basket can contain no more than $35$ eggs. What is the samllest number of baskets needed to contain $150$ eggs? 
Options:
aoVal: A
content: $$2$$ 
aoVal: B
content: $$3$$ 
aoVal: C
content: $$4$$ 
aoVal: D
content: $$5$$ 
aoVal: E
content: $$6$$ 
Answer: D
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Which of the following ratio is equivalent to $$18:12$$? 
Options:
aoVal: A
content: $$2:3$$ 
aoVal: B
content: $$4:6$$ 
aoVal: C
content: $$15:10$$ 
aoVal: D
content: $$21:10$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions->Ratio
Problem: Which of these statements is correct? 
Options:
aoVal: A
content: $$6\frac{1}{3}\textless{}6.3$$ 
aoVal: B
content: $$\frac{9}{6}\textgreater{} \frac{10}{7}$$ 
aoVal: C
content: $$\frac{15}{64}\textless\frac{9}{40}$$ 
aoVal: D
content: $$3\frac{1}{7}\textgreater3.7$$ 
aoVal: E
content: $$\frac{12}{25}\textgreater\frac{50}{99}$$ 
Answer: B
Analysis: N/A.　 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Comparing, Ordering and Estimating->Comparing and Ordering->By Converting Fractions into Decimals
Problem: A bag contains green mints and red mints only. If 75\% of the mints are green, what is the ratio of the number of green mints to the number of red mints? (A) 
Options:
aoVal: A
content: $$3 : 4$$ 
aoVal: B
content: $$3 : 1$$ 
aoVal: C
content: $$4 : 3$$ 
aoVal: D
content: $$1 : 3$$ 
aoVal: E
content: $$3 : 7$$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions
Source: 其它
Problem: The product of $5$ and $a$ is the same as $2$ plus $b$. Which of the following is the correct expression? 
Options:
aoVal: A
content: $5a+2+b$ 
aoVal: B
content: $5a=2+b$ 
aoVal: C
content: $5+a=2+b$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation
Source: 其它
Problem: Three friends write down the first $30$ numbers ($1--30$) on separate cards.  Karry says, ``I have all the prime numbers.''  Barry says, ``I have all the odd numbers that aren\textquotesingle t prime.''  Larry says, ``I have all the even numbers that aren\textquotesingle t prime.''  How many cards is Larry holding? 
Options:
aoVal: A
content: $$30$$ 
aoVal: B
content: $$15$$ 
aoVal: C
content: $$16$$ 
aoVal: D
content: $$14$$ 
aoVal: E
content: $$10$$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Expressions: The combination of numbers, symbols and operators.  (1) A single number or a single letter can be considered an algebraic expression.  (2) Equations and inequalities are NOT expressions.  Which of the following is \textbf{NOT} an expression? 
Options:
aoVal: A
content: $$3$$ 
aoVal: B
content: a 
aoVal: C
content: $$a+b=a+b$$ 
aoVal: D
content: $$b+1+a$$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Source: 其它
Problem: Bill is making a scale model of Willis Tower. The Willis Tower is $440\text{m}$ tall and his model is $110\text{cm}$ tall. What is the scale of the model, in its simplest form? 
Options:
aoVal: A
content: $1:4$ 
aoVal: B
content: $4:1$ 
aoVal: C
content: $1:400$ 
aoVal: D
content: $400:1$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions->Proportions->Scale
Problem: \textbf{Which is easier to do?} 
Options:
aoVal: A
content: $$14-9-4=$$ 
aoVal: B
content: $$14-4-9=$$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Addition and Subtraction 
Source: 其它
Problem: $3, 6, 12, 24, 48, \dots$  What number comes next in the sequence? 
Options:
aoVal: A
content: $$144$$ 
aoVal: B
content: $$108$$ 
aoVal: C
content: $$84$$ 
aoVal: D
content: $$64$$ 
aoVal: E
content: $$96$$ 
Answer: E
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: $2.7\times913=2465.1$  $270\times0.913=?$ 
Options:
aoVal: A
content: $$246.51$$ 
aoVal: B
content: $$24.651$$ 
aoVal: C
content: $$2.4651$$ 
aoVal: D
content: $$2465.1$$ 
aoVal: E
content: $$24651$$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Carl has $7$ dollars and $40$ cents. One hammer cost $1.70$ dollars, and one saw is $50$ cents cheaper than one hammer. After buying $3$ hammer and $1$ saw, how much does he have left? 
Options:
aoVal: A
content: $1.5.$ dollars 
aoVal: B
content: $1.3.$ dollars 
aoVal: C
content: $1.2.$ dollars 
aoVal: D
content: $1.1.$ dollars 
aoVal: E
content: $0.8.$ dollars 
Answer: D
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Which of the following group has equivalent ratios? 
Options:
aoVal: A
content: $2$ to $5$, $\frac{0.5}{5}$ 
aoVal: B
content: $\frac{2}{5}$, $2$ to $15$ 
aoVal: C
content: $$\frac{2}{5}$$, $2:5$ 
aoVal: D
content: $2:5$, $\frac{5}{2}$ 
Answer: C
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions
Source: 其它
Problem: Luna asks her grandmother how old she is, and her grandmother replies: "if you multiply your age by $5$ and then add by $7$, then you would be my age." Luna is $12$ years old. Which of the following is an equation that correctly represents Luna\textquotesingle s grandmother\textquotesingle s age? Let $x$ represent grandmother\textquotesingle s age. 
Options:
aoVal: A
content: $x = 12 \times 5 - 7$ 
aoVal: B
content: $x ~= 12 \times 5 + 7$ 
aoVal: C
content: $x + 1= 12 \times 5 + 7$ 
aoVal: D
content: $ 12 \times 5 + 7 - 1$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation
Source: 其它
Problem: A disc has a radius of 5 cm. If the disc rotates about its central axis at an angular speed of 8 rev/s, what is the linear speed of a point on the rim of the disc?  $\textasciitilde$  $\textasciitilde$ 
Options:
aoVal: A
content: 0.4m/s 
aoVal: B
content: 2.5m/s 
aoVal: C
content: 3.9m/s 
aoVal: D
content: 50m/s 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Comparing, Ordering and Estimating
Source: 其它
Problem: A book costs £8.32.  Mark buys the book and pays with a~£$$10$$ note.  All the change he gets is coins.  What is the smallest number of coins that he can receive in change? 
Options:
aoVal: A
content: $$6$$ 
aoVal: B
content: $$7$$ 
aoVal: C
content: $$9$$ 
aoVal: D
content: $$5$$ 
aoVal: E
content: $$8$$ 
Answer: A
Analysis: N/A.　 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Unit Conversion->Converting between Units of Money
Problem: A large store has a customer service department where customers can go to ask for help with store-related issues. According to store records, approximately $\dfrac{1}{4}$~of all customers who go to the service department ask for help finding an item. Assume the reason each customer goes to the service department is independent from customer to customer. Based on the approximation, what is the probability that at least 1 of the next 4 customers who go to the service department will ask for help finding an item? 
Options:
aoVal: A
content: $4(\dfrac{1}{4})$ 
aoVal: B
content: $1-(\dfrac{1}{4})^{4}$ 
aoVal: C
content: $1-(\dfrac{3}{4})^{4}$ 
aoVal: D
content: $4(\dfrac{1}{4})^{1}(\dfrac{3}{4})^{3}$ 
aoVal: E
content: $(\dfrac{4}{4})(\dfrac{3}{4})(\dfrac{2}{4})(\dfrac{1}{4})$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables
Source: 其它
Problem: Which of these fractions is equal to $0.2$? 
Options:
aoVal: A
content: $\dfrac{1}{2}$ 
aoVal: B
content: $\dfrac{1}{3}$ 
aoVal: C
content: $\dfrac{1}{4}$ 
aoVal: D
content: $\dfrac{1}{5}$ 
aoVal: E
content: $\dfrac{1}{6}$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Basic Understanding of Decimals->Converting Fractions into Decimals
Problem: Which of the following numbers when rounded off to the nearest ten becomes $$26500$$? 
Options:
aoVal: A
content: $$26449$$ 
aoVal: B
content: $$26495$$ 
aoVal: C
content: $$26507$$ 
aoVal: D
content: $$26563$$ 
Answer: B
Analysis: N/A.　 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Unit Conversion
Overseas In-curriculum->Knowledge Point->Operations of Numbers ->Estimation->Estimating the Results of Computations->Rounding Whole Numbers
Problem: There are $$27$$ boys and $$18$$ girls at a school camp. What is the ratio of the number of boys to the total number of pupils at the school camp? Give the answer in the simplest form. 
Options:
aoVal: A
content: $$2:3$$ 
aoVal: B
content: $$2:5$$ 
aoVal: C
content: $$3:2$$ 
aoVal: D
content: $$3:5$$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions->Ratio
Problem: Find the value of $\frac{4}{9} \times \frac{3}{16}$. 
Options:
aoVal: A
content: $\frac{1}{6}$ 
aoVal: B
content: $\frac{1}{3}$ 
aoVal: C
content: $\frac{1}{12}$ 
aoVal: D
content: $\frac{2}{15}$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Fractions
Source: 其它
Problem: ~When using the kinematics equation $x\textbackslash{} =\textbackslash{} x\_{0}+v\_{x0}t+1/2a\_{x}t^{2}$, which of the following is always assumed to be true? 
Options:
aoVal: A
content: $a\_{x}\textbackslash{} =\textbackslash{} zero$ 
aoVal: B
content: $x\textbackslash{} \gt\textbackslash{} x\_{0}$ 
aoVal: C
content: $v\_{x0}$~is positive. 
aoVal: D
content: $a\_{x}$~is constant. 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: How many sixths are there in $$2\dfrac{2}{3}$$? 
Options:
aoVal: A
content: $$\frac{4}{3}$$ 
aoVal: B
content: $$4$$ 
aoVal: C
content: $$8$$ 
aoVal: D
content: $$16$$ 
Answer: D
Analysis: N/A. 
Knowledge points: Overseas In-curriculum->Knowledge Point->Knowing Numbers->Fractions->Meaning of Fractions->The Wholes and Unit Fraction
Overseas Competition->Knowledge Point->Calculation Modules->Operations through Formulas
Problem: Observe the pattern in the following sequence. What is the $67\text{th}$ number in this sequence?  $4, 3, 1, 2, 5, 4, 3, 1, 2, 5, 4, 3, 1, 2, 5\dots$ 
Options:
aoVal: A
content: $$1$$ 
aoVal: B
content: $$2$$ 
aoVal: C
content: $$3$$ 
aoVal: D
content: $$4$$ 
aoVal: E
content: $$5$$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Patterns in Number Sequences
Source: 其它
Problem: Simplify：$$(x+3)(x+4)$$． 
Options:
aoVal: A
content: $$x^{2}+7x+12$$ 
aoVal: B
content: $$x^{2}+5x+12$$ 
aoVal: C
content: $$x^{2}+2x+12$$ 
aoVal: D
content: $$x^{2}+12$$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Source: 其它
Problem: The distribution of monthly rent for one-bedroom apartments in a city is approximately normal with mean $\textbackslash$$936 and standard deviation $\textbackslash$$61. A graduate student is looking for a one-bedroom apartment and wants to pay no more than $\textbackslash$$800 in monthly rent. Of the following, which is the best estimate of the percent of one-bedroom apartments in the city with a monthly rent of at most $\textbackslash$$800? 
Options:
aoVal: A
content: 1.3\% 
aoVal: B
content: 2.5\% 
aoVal: C
content: 50\% 
aoVal: D
content: 95\% 
aoVal: E
content: 97.5\% 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Yesterday is Saturday, What day is the day after tomorrow? 
Options:
aoVal: A
content: Monday 
aoVal: B
content: Tuesday 
aoVal: C
content: Wednesday 
aoVal: D
content: Thursday 
aoVal: E
content: Sunday 
Answer: B
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: A bus leaves from a bus stop at $06:30$ and then every half hour afterwards. If ~arrives at the bus stop at $10:32$, how long does he have to wait for a bus? 
Options:
aoVal: A
content: $28\rm min$ 
aoVal: B
content: $18\rm min$ 
aoVal: C
content: $32\rm min$ 
aoVal: D
content: $2\rm min$ 
aoVal: E
content: $32\rm min$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Which sequence is an arithmetic sequence? 
Options:
aoVal: A
content: $$1$$, $$2$$, $$4$$, $$5$$, $$7$$, $$8$$, $$10$$, $$11$$, $$\cdots$$ 
aoVal: B
content: $$1$$, $$2$$, $$1$$, $$2$$, $$1$$, $$2$$, $$1$$, $$2$$, $$\cdots$$ 
aoVal: C
content: $$2$$, $$5$$, $$8$$, $$11$$, $$14$$, $$17$$, $$21$$, $$\cdots$$ 
aoVal: D
content: $$5$$, $$10$$, $$15$$, $$20$$, $$25$$, $$30$$, $$35$$, $$\cdots$$ 
Answer: D
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Problem: What is the simplest fraction of $\frac{125}{750}$? 
Options:
aoVal: A
content: $\frac{25}{150}$ 
aoVal: B
content: $\frac{5}{30}$ 
aoVal: C
content: $\frac{1}{6}$ 
aoVal: D
content: $\frac{2}{6}$ 
aoVal: E
content: $\frac{6}{30}$ 
Answer: C
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Fractions
Source: 其它
Problem: I have 25 cards numbered 30-54. What percentage of the cards show multiples of 4? 
Options:
aoVal: A
content: 6\% 
aoVal: B
content: 20\% 
aoVal: C
content: 24\% 
aoVal: D
content: 28\% 
aoVal: E
content: 30\% 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Percentage Calculation
Source: 其它
Problem: Which of the following is a continued ratio? 
Options:
aoVal: A
content: $A:B=3:1$ 
aoVal: B
content: $A:B:C=2:1$ 
aoVal: C
content: $A:B:C=1:1:1$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions
Source: 其它
Problem: The sequence below must contain all the numbers from $$1$$ to $$4$$, and each number can only appear once. What number comes next?  $$1$$, $$4$$, $$3$$,~\uline{~~~~~~~~~~}~． 
Options:
aoVal: A
content: $$4$$ 
aoVal: B
content: $$2$$ 
aoVal: C
content: $$1$$ 
aoVal: D
content: $$3$$ 
Answer: B
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: An object is moving with a constant acceleration of 2 m/s^{2}. If its initial velocity is 10 m/s, what is its velocity after 5 seconds? 
Options:
aoVal: A
content: 0 m/s 
aoVal: B
content: 10 m/s 
aoVal: C
content: 20 m/s 
aoVal: D
content: 30 m/s 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Negative Numbers
Source: 其它
Problem: How many terms and variables does the expression $3xz+y+25$ have? 
Options:
aoVal: A
content: $3,3$ 
aoVal: B
content: $2,3$ 
aoVal: C
content: $3,2$ 
aoVal: D
content: $2,2$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Source: 其它
Problem: Elma took $$2$$ candy bars to school. First, she traded each of them for $$4$$ apples, and then she traded each of the apples for $$3$$ mandarin oranges. How many mandarin oranges did she have after all the trading? (2008 Math Kangaroo Problem, Level 1-2, Question \#9) 
Options:
aoVal: A
content: $$2+4+3$$ 
aoVal: B
content: $$2\times4+3$$ 
aoVal: C
content: $$2+4\times3$$ 
aoVal: D
content: $$2\times4\times3$$ 
Answer: D
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Object Substitution
Problem: Devi is $$9$$ years old and Valli is $$13$$ years old now. What is the ratio of Devi\textquotesingle s age to Valli\textquotesingle s age in $$5$$ years\textquotesingle{} time? 
Options:
aoVal: A
content: $$3:7$$ 
aoVal: B
content: $$7:9$$ 
aoVal: C
content: $$13:14$$ 
aoVal: D
content: $$9:18$$ 
Answer: B
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions->Ratio
Problem: Which of the following is not a unit of length? 
Options:
aoVal: A
content: centimeter 
aoVal: B
content: meter 
aoVal: C
content: inch 
aoVal: D
content: pound 
Answer: D
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Unit Conversion->Knowing Units
Source: 其它
Problem: Calculate the value of $$13+5+91-7+87-1+27+40$$ 
Options:
aoVal: A
content: $$210$$ 
aoVal: B
content: $$250$$ 
aoVal: C
content: $$255$$ 
aoVal: D
content: $$271$$ 
aoVal: E
content: None of the above 
Answer: C
Analysis: $$N.A$$ 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: If $p-9=12$, what number does $p$ stand for? 
Options:
aoVal: A
content: $$6$$ 
aoVal: B
content: $$18$$ 
aoVal: C
content: $$21$$ 
aoVal: D
content: $$3$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Addition and Subtraction ->Subtraction of Whole Numbers->Subtraction in Horizontal Form