math-eval/TAL-SCQ5K huggingface dataset:
Problem: $$20$$ divided by $$\frac 12$$ equals~\uline{~~~~~~~~~~}~. ($$1983-84$$ MATHCOUNTS, G$$6$$, Problem $$15$$) 
Options:
aoVal: A
content: $$40$$ 
aoVal: B
content: $$10$$ 
aoVal: C
content: $$5$$ 
aoVal: D
content: $$2$$ 
Answer: A
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Fractions->Operations of Fractions
Problem: Find the next term of the following sequence: $1, 1, 2,~ 3, 5, \cdots $ 
Options:
aoVal: A
content: $$6$$ 
aoVal: B
content: $$7$$ 
aoVal: C
content: $$8$$ 
aoVal: D
content: $$9$$ 
aoVal: E
content: $$10$$ 
Answer: C
Analysis: $$N.A$$ 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Arithmetic Sequences
Source: 其它
Problem: $27 + 12-3 \times 4 =$~\uline{~~~~~~~~~~}~ 
Options:
aoVal: A
content: $$27$$ 
aoVal: B
content: $$30$$ 
aoVal: C
content: $$51$$ 
aoVal: D
content: $$63$$ 
aoVal: E
content: $$144$$ 
Answer: A
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Comparing, Ordering and Estimating->Comparing and Ordering
Source: 其它
Problem: Suppose $2\times3=\circ$, $3\times3=\triangle$, $2\times4=\square$. Arrange the three shape according to their values from largest to smallest. 
Options:
aoVal: A
content: $\circ$ $\triangle$ $\square$ 
aoVal: B
content: $\circ$$\square$$\triangle$ 
aoVal: C
content: $\triangle$ $\circ$$\square$ 
aoVal: D
content: $\triangle$ $\square$$\circ$ 
aoVal: E
content: $\square$$\triangle$$\circ$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Mixed Operations
Source: 其它
Problem: Find the next number in the sequence below.  $$22, 21, 19, 16, 12, \cdots$$ 
Options:
aoVal: A
content: $$9$$ 
aoVal: B
content: $$8$$ 
aoVal: C
content: $$7$$ 
aoVal: D
content: $$6$$ 
aoVal: E
content: None of the above 
Answer: C
Analysis: $$N.A$$ 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Patterns in Number Sequences
Source: 其它
Problem: Which of the following fractions is equivalent to $\frac{2}{10}$? 
Options:
aoVal: A
content: $\frac{2}{5}$ 
aoVal: B
content: $\frac{1}{10}$ 
aoVal: C
content: $\frac{3}{15}$ 
aoVal: D
content: $\frac{7}{15}$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: In a cave, there were two horses, one bear and three turtles. Later, five horses, three bears and four turtles joined them. How many animals are in the cave now? 
Options:
aoVal: A
content: $$6$$ 
aoVal: B
content: $$8$$ 
aoVal: C
content: $$10$$ 
aoVal: D
content: $$15$$ 
aoVal: E
content: $$18$$ 
Answer: E
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: What is the next number in the sequence below?  $$29, 28, 25, 20, 13, \cdots $$ 
Options:
aoVal: A
content: $$4$$ 
aoVal: B
content: $$5$$ 
aoVal: C
content: $$6$$ 
aoVal: D
content: $$7$$ 
aoVal: E
content: None of the above 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Arithmetic Sequences
Source: 其它
Problem: $$30\textasciitilde\text{g}$$ coffee is dissolved in $$90\textasciitilde\text{g}$$ of milk. What are the ratio of coffee to milk and the ratio of coffee to coffee-milk, respectively? 
Options:
aoVal: A
content: $$1:3$$, $$1:4$$ 
aoVal: B
content: $$1:4$$, $$1:3$$ 
aoVal: C
content: $$3:1$$, $$4:1$$ 
aoVal: D
content: $$4:1$$, $$3:1$$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions
Problem: What is the result of $$0+1+2+3+4-3-2-1-0$$? 
Options:
aoVal: A
content: $$0$$ 
aoVal: B
content: $$2$$ 
aoVal: C
content: $$4$$ 
aoVal: D
content: $$10$$ 
aoVal: E
content: $$16$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Addition and Subtraction ->Addition and Subtraction of Whole Numbers->Questions Involving Addition and Subtraction
Problem: The product of a two-digit number and a one-digit number is a~\uline{~~~~~~~~~~}~-digit number. 
Options:
aoVal: A
content: two 
aoVal: B
content: three 
aoVal: C
content: three or two 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division
Problem: （$$2016$$ Henry Park Primary School, Quiz $$1$$, Primary Two, Question \#$$3$$）  $$831+58=$$ ． 
Options:
aoVal: A
content: $$773$$ 
aoVal: B
content: $$827$$ 
aoVal: C
content: $$888$$ 
aoVal: D
content: $$889$$ 
Answer: D
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Addition and Subtraction
Problem: $$27 \times 3 \textgreater{}x^{2}$$  What is the largest possible value of $$x$$? 
Options:
aoVal: A
content: $$9$$ 
aoVal: B
content: $$8$$ 
aoVal: C
content: $$7$$ 
aoVal: D
content: $$6$$ 
aoVal: E
content: $$5$$ 
Answer: B
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Inequalities->Solving Inequalities
Problem: Paul wanted to buy $9$ basketballs. The basketballs were sold either for $3.2$ dollars each or at $9$ dollars for a bag of $3$ basketballs. How much money would Paul save if he buys three bags of basketballs instead of buying $9$ basketballs separately? 
Options:
aoVal: A
content: $1.2$ dollars 
aoVal: B
content: $1$ dollar 
aoVal: C
content: $0.9$ dollars 
aoVal: D
content: $0.8$ dollars 
aoVal: E
content: $0.6$ dollars 
Answer: E
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: $(1)\textbackslash{} 5\times3=$ 
Options:
aoVal: A
content: $$15$$ 
aoVal: B
content: $$10$$ 
aoVal: C
content: $$5$$ 
aoVal: D
content: $$20$$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division
Source: 其它
Problem: What is the next number in the sequence below?  $112, 105, 91, 70, $~\uline{~~~~~~~~~~}~ 
Options:
aoVal: A
content: $$59$$ 
aoVal: B
content: $$49$$ 
aoVal: C
content: $$42$$ 
aoVal: D
content: $$35$$ 
aoVal: E
content: $$28$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Operations with New Definition->Finding Patterns
Source: 其它
Problem: Which of the following has the largest sum of coefficients of each term ? 
Options:
aoVal: A
content: $3x+24$ 
aoVal: B
content: $24xy+2$ 
aoVal: C
content: $7a+3b+20c$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Source: 其它
Problem: Write $$4\frac{3}{20}$$ as a decimal. 
Options:
aoVal: A
content: $$4.32$$ 
aoVal: B
content: $$4.3$$ 
aoVal: C
content: $$4.15$$ 
aoVal: D
content: $$4.015$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Basic Understanding of Decimals
Problem: The area of the Mountain Island Educational State Forest in North Carolina is $3$ square miles. What is the area, in \uline{square yards}, of this forest? ($1$ mile = $1,760$ yards) 
Options:
aoVal: A
content: 5,280 
aoVal: B
content: 15,840 
aoVal: C
content: 3,097,600 
aoVal: D
content: 9,292,800 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: The best way to write the quotient of $4$ by $x$ is~\uline{~~~~~~~~~~}~. 
Options:
aoVal: A
content: $$4x$$ 
aoVal: B
content: $$x\div 4$$ 
aoVal: C
content: $4\div x$ 
aoVal: D
content: $\frac{4}{x}$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Source: 其它
Problem: How many digits does the number $1230$ have? 
Options:
aoVal: A
content: $$1$$ 
aoVal: B
content: $$2$$ 
aoVal: C
content: $$3$$ 
aoVal: D
content: $$4$$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Calculation of Multi-digit Numbers
Source: 其它
Problem: Amy has $a$ lollipops. Anna has $6$ more lollipops than Amy. Anna has~\uline{~~~~~~~~~~}~lollipops. 
Options:
aoVal: A
content: $$a-6$$ 
aoVal: B
content: $$a+6$$ 
aoVal: C
content: $$16$$ 
aoVal: D
content: $$6$$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Problem: $$1-\frac{1}{12}-\frac{1}{6}=$$~\uline{~~~~~~~~~~}~  What is the answer? 
Options:
aoVal: A
content: $$\frac{1}{12}$$ 
aoVal: B
content: $$\frac{3}{4}$$ 
aoVal: C
content: $$\frac{5}{6}$$ 
aoVal: D
content: $$\frac{11}{12}$$ 
Answer: B
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Fractions->Operations of Fractions
Problem: What should the last number in the series be?  $$1$$, $$2$$, $$5$$, $$10$$, $$17$$, $$26$$,~\uline{~~~~~~~~~~}~ 
Options:
aoVal: A
content: $$47$$ 
aoVal: B
content: $$40$$ 
aoVal: C
content: $$37$$ 
aoVal: D
content: $$35$$ 
aoVal: E
content: $$33$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Patterns in Number Sequences
Problem: In $$26.73$$, the digit $$3$$ has the value of ． 
Options:
aoVal: A
content: $$3$$ 
aoVal: B
content: $$0.3$$ 
aoVal: C
content: $$0.03$$ 
aoVal: D
content: $$0.003$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Basic Understanding of Decimals
Problem: Which of the following sequences is a Geometric sequence? 
Options:
aoVal: A
content: $$1$$, $$2$$, $$4$$, $$5$$, $$7$$, $$8$$, $$10$$, $$11$$, $$\cdots$$ 
aoVal: B
content: $$1$$, $$2$$, $$4$$, $$6$$, $$8$$, $$10$$, $$12$$, $$14$$, $$\cdots$$ 
aoVal: C
content: $$2$$, $$4$$, $$8$$, $$16$$, $$32$$, $$64$$, $$128$$, $$\cdots$$ 
aoVal: D
content: $$5$$, $$10$$, $$15$$, $$25$$, $$30$$, $$35$$, $$\cdots$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Arithmetic Sequences
Problem: Which of the following fractions is equivalent to $\frac{3}{4}$ 
Options:
aoVal: A
content: $\frac{4}{5}$ 
aoVal: B
content: $\frac{9}{12}$ 
aoVal: C
content: $\frac{9}{16}$ 
aoVal: D
content: $\frac{4}{3}$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Shawn, Spar and Spike went out to buy some sporting goods. Shawn spent $21$ dollars on $3$ basketballs and $2$ footballs. Spark spent $18$ dollars on $4$ footballs and $1$ volleyball. Spike spent $21$ dollars on $3$ footballs and $2$ volleyballs. How much is one basketball? 
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 is (are) true?  I. The sampling distribution of a sample mean will be approximately normally distributed for sufficiently large samples, regarless of the shape of the original population.  II. The sampling distribution of a sample mean will be normally distributed if the population from which the samples are drawn is normal.  III. $\sigma\_{\bar{x}} = \frac{\sigma}{\sqrt{n}}$ if N$\geq$10n. 
Options:
aoVal: A
content: I 
aoVal: B
content: II 
aoVal: C
content: III 
aoVal: D
content: I, II 
aoVal: E
content: I, II, III 
Answer: E
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Yesterday was Sunday. What day is tomorrow? (2019 Math Kangaroo Problem, Level 3-4, Question \#3) 
Options:
aoVal: A
content: Tuesday 
aoVal: B
content: Thursday 
aoVal: C
content: Wedncsday 
aoVal: D
content: Monday 
aoVal: E
content: Saturday 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: $$1\frac{1}{4}\times 1\frac{1}{5}\times 1\frac{1}{6}\times 1\frac{1}{7}\times 1\frac{1}{8}\times 1\frac{1}{9}\times 1\frac{1}{10}=$$． 
Options:
aoVal: A
content: $$\frac{1}{4}$$ 
aoVal: B
content: $$\frac{11}{4}$$ 
aoVal: C
content: $$\frac{1}{10}$$ 
aoVal: D
content: $$\frac{17}{10}$$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Fractions
Problem: What is the product of $$628$$ and $$6$$? 
Options:
aoVal: A
content: $$3628$$ 
aoVal: B
content: $$3668$$ 
aoVal: C
content: $$3728$$ 
aoVal: D
content: $$3768$$ 
Answer: D
Knowledge points: Overseas In-curriculum->Knowledge Point->Operations of Numbers ->Multiplication of Whole Numbers->Multiplication of Multi-Digit Numbers and 1-Digit Numbers->Multiplication of 3-Digit and 1-Digit (with regrouping for more than once)
Overseas Competition->Knowledge Point->Calculation Modules->Operations through Formulas
Problem: Which of the following is NOT an algebraic expression? 
Options:
aoVal: A
content: $3b-b$ 
aoVal: B
content: $3b-b=8$ 
aoVal: C
content: $-b$ 
aoVal: D
content: $$3$$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Source: 其它
Problem: If Toyota makes 10 million cars its long run ATC is $\textbackslash$20,000$ car. If it makes 11 million cars its long run ATC is $\textbackslash$25,000$ car. What is the best description? 
Options:
aoVal: A
content: economies of scale 
aoVal: B
content: diseconomies of scale 
aoVal: C
content: constant returns of scale 
aoVal: D
content: increasing returns to scale 
aoVal: E
content: none of the above 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation
Source: 其它
Problem: The sum of two different numbers is $$45$$. At least one of them is less than． 
Options:
aoVal: A
content: $$5$$ 
aoVal: B
content: $$18$$ 
aoVal: C
content: $$20$$ 
aoVal: D
content: $$22$$ 
aoVal: E
content: $$23$$ 
Answer: E
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
Problem: $20-8=$~\uline{~~~~~~~~~~}~ 
Options:
aoVal: A
content: $$10$$ 
aoVal: B
content: $$11$$ 
aoVal: C
content: $$12$$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Bert has $7$ dollars. He is going to buy $4$ cupcakes which cost $80$ cents each and a certain number of~ candies which cost $40$ cents each. How many basketballs at most can he buy? 
Options:
aoVal: A
content: $$6$$ 
aoVal: B
content: $$7$$ 
aoVal: C
content: $$8$$ 
aoVal: D
content: $$9$$ 
aoVal: E
content: $$11$$ 
Answer: D
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Which of the following is equivalent to $(-(-2)^{2})^{3}$ ?  $\textasciitilde$ 
Options:
aoVal: A
content: $$-64$$ 
aoVal: B
content: $$64$$ 
aoVal: C
content: $$-32$$ 
aoVal: D
content: $$32$$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: $20-3\times2+4=$. 
Options:
aoVal: A
content: $$2$$ 
aoVal: B
content: $$10$$ 
aoVal: C
content: $$12$$ 
aoVal: D
content: $$18$$ 
aoVal: E
content: $$38$$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division
Problem: Calculate~$\dfrac{1}{8}+\dfrac{11}{24}=$~\uline{~~~~~~~~~~}~ 
Options:
aoVal: A
content: $$\dfrac{3}{8}$$ 
aoVal: B
content: $$\dfrac{7}{12}$$ 
aoVal: C
content: $$\dfrac{3}{24}$$ 
aoVal: D
content: $$\dfrac{1}{2}$$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Fractions->Operations of Fractions->Addition and Subtraction of Fractions
Source: 其它
Problem: The average cost of living in California in one year is $46,636$ dollars. The interest rate of US banks is $2.5 \textbackslash\%$. How much money do you need to deposit into the bank to cover your annual cost? 
Options:
aoVal: A
content: $1$ million 
aoVal: B
content: $1.5$ million 
aoVal: C
content: $2$ million 
aoVal: D
content: $2.5$ million 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Percentage Calculation
Source: 其它
Problem: Which of the following properties is used in when combining like terms?  $3x^{2}y+5-x^{2}y$  $=(3-1)x^{2}y+5$  $=2x^{2}y+5$ 
Options:
aoVal: A
content: commutative property 
aoVal: B
content: associative property 
aoVal: C
content: distributive property 
aoVal: D
content: private property 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division->Applying Special Whole Numbers->Patterns of Multiples of 12345679(whole-numbers)
Source: 其它
Problem: Every time the witch has $$1$$ red flower, she turns it into $$3$$ yellow flowers. Every time she has $$1$$ yellow flowers, she turns it into $$2$$ red flowers. Now she has $2$ red flowers and $1$ yellow flowers. What is the smallest number of flowers she can end up with if she cast spells three times? 
Options:
aoVal: A
content: $$6$$ 
aoVal: B
content: $$7$$ 
aoVal: C
content: $$8$$ 
aoVal: D
content: $$9$$ 
aoVal: E
content: $$10$$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution
Source: 其它
Problem: $2$ rabbits weigh as much as $3$ chikens, and $1$ rabbit weighs as much as $6$ ducks. How many ducks weigh the same as one chiken? 
Options:
aoVal: A
content: $$3$$ 
aoVal: B
content: $$4$$ 
aoVal: C
content: $$5$$ 
aoVal: D
content: $$6$$ 
aoVal: E
content: $$7$$ 
Answer: B
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution
Source: 其它
Problem: For the following numbers: $$-\frac{1}{3}$$, $$0.12$$, $$-2$$, $$2$$, $$\frac{3}{4}$$, $$-1\frac{1}{2}$$, how many positive rational numbers are there? 
Options:
aoVal: A
content: $$0$$ 
aoVal: B
content: $$1$$ 
aoVal: C
content: $$2$$ 
aoVal: D
content: $$3$$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Operations with New Definition
Source: 其它
Problem: Simon cut a cake into $$12$$ equal pieces. He ate $3$ pieces and both his parents ate $$2$$ pieces each. What fraction of the cake was left？ 
Options:
aoVal: A
content: $$\dfrac{3}{12}$$ 
aoVal: B
content: $$\dfrac{4}{12}$$ 
aoVal: C
content: $$\dfrac{5}{12}$$ 
aoVal: D
content: $$\dfrac{7}{12}$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Fractions->Operations of Fractions
Problem: The little kangaroo was sick. Dr. Ohpain prescribed $$3$$ pills for him to take one at a time every twenty minutes. How many minutes after taking the first pill will the little kangaroo take the last pill? (2000 Math Kangaroo Problem, Level 3-4, Question \#2) 
Options:
aoVal: A
content: $$20$$ 
aoVal: B
content: $$30$$ 
aoVal: C
content: $$40$$ 
aoVal: D
content: $$50$$ 
aoVal: E
content: $$60$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division->Multiplication and Division of Whole Numbers->Multiplication out of the Multiplication Table
Problem: $$85.3-8.53+5.83=$$． 
Options:
aoVal: A
content: $$99.66$$ 
aoVal: B
content: $$93.7$$ 
aoVal: C
content: $$88$$ 
aoVal: D
content: $$82.6$$ 
aoVal: E
content: $$81.3$$ 
Answer: D
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Addition and Subtraction of Decimals->Mixed Operations of Addition and Subtraction of Decimals
Problem: $3+6\times14\div4+9=$? 
Options:
aoVal: A
content: $$33$$ 
aoVal: B
content: $$27$$ 
aoVal: C
content: $$18$$ 
aoVal: D
content: $$36$$ 
aoVal: E
content: $$40$$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: $a^{2}\times a^{}x=$． 
Options:
aoVal: A
content: $a^{2x}$ 
aoVal: B
content: $a^{2+x}$ 
aoVal: C
content: $2a^{2x}$ 
aoVal: D
content: $2a^{2+x}$ 
Answer: B
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Power->Computing Powers
Problem: How many sixths are in $15$? 
Options:
aoVal: A
content: $$90$$ 
aoVal: B
content: $$2.5$$ 
aoVal: C
content: $$9$$ 
aoVal: D
content: $$25$$ 
aoVal: E
content: $$0.9$$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: Can these 3 shapes form squares? 
Options:
aoVal: A
content: Yes 
aoVal: B
content: No 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Patterns in Number Sequences->Pyramid Sequences
Source: 其它
Problem: Which of the following does not contain a constant? 
Options:
aoVal: A
content: $3x-2$ 
aoVal: B
content: $2x+\frac{y+1}{2}$ 
aoVal: C
content: $$4a+\frac{3}{b}$$ 
aoVal: D
content: $51$ 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions
Source: 其它
Problem: The numbers in each of the three brackets follow the same rule. Find the missing number.  $$\left[10, 50, 15 \right]\textasciitilde\textasciitilde\left[37, 120, 23 \right]\textasciitilde\textasciitilde\left[16, 56, ?\right]$$ 
Options:
aoVal: A
content: $$8$$ 
aoVal: B
content: $$10$$ 
aoVal: C
content: $$12$$ 
aoVal: D
content: $$14$$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Patterns in Number Sequences->Filling Sequences according to the Patterns
Problem: The pages of a book are numbered 1, 2, 3, 4, 5, and so on. The digit 5 appears exactly 16 times. What is the maximum number of pages this book could have? (2019 Math Kangaroo Problem, Level 3-4, Question \#19) 
Options:
aoVal: A
content: $$49$$ 
aoVal: B
content: $$64$$ 
aoVal: C
content: $$66$$ 
aoVal: D
content: $$74$$ 
aoVal: E
content: $$80$$ 
Answer: D
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: David had $30$ apples. He divided all his apples rqually among his classmates. Which of the following was definitely not the number of his classmates? 
Options:
aoVal: A
content: $$2$$ 
aoVal: B
content: $$3$$ 
aoVal: C
content: $$5$$ 
aoVal: D
content: $$6$$ 
aoVal: E
content: $$8$$ 
Answer: E
Analysis: N/A 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它
Problem: $35097$ when written in words is: 
Options:
aoVal: A
content: Thirty five thousand nine hundred and seventy 
aoVal: B
content: Three hundred and fifty thousand and ninety seven 
aoVal: C
content: Thirty five thousand and ninety seven 
aoVal: D
content: Thirty five thousand nine hundred and seven 
aoVal: E
content: Thirty nine thousand and fifty seven 
Answer: C
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Read and Write numbers
Problem: Which of the following is the smallest? 
Options:
aoVal: A
content: $4\dfrac{1}{2}$ 
aoVal: B
content: $$6$$ 
aoVal: C
content: $\dfrac{21}{5}$ 
aoVal: D
content: $4\dfrac{9}{20}$ 
Answer: C
Analysis: N/A. 
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules->Comparing, Ordering and Estimating->Comparing and Ordering->By Converting Fractions into Decimals
Problem: l am a number. If you count by tens you will say my name. I am not ten. If you add me to 30, you will get a  number less than 60. Who am I? 
Options:
aoVal: A
content: $$20$$ 
aoVal: B
content: $$30$$ 
aoVal: C
content: $$40$$ 
aoVal: D
content: $$50$$ 
aoVal: E
content: $$60$$ 
Answer: A
Knowledge points: Overseas Competition->Knowledge Point->Calculation Modules
Source: 其它