Tuesday, February 27, 2018
(in North America and South America)
Wednesday, February 28, 2018
(outside of North American and South America)
©2017 University of Waterloo
Time: 60 minutes
Calculating devices are allowed, provided that they do not have any of the following features: (i) internet access, (ii) the ability to communicate with other devices, (iii) information previously stored by students (such as formulas, programs, notes, etc.), (iv) a computer algebra system, (v) dynamic geometry software.
The value of \(2016-2017+2018-2019+2020\) is
On Monday, the minimum temperature in Fermatville was \(-11^\circ\mbox{C}\) and the maximum temperature was \(14^\circ\mbox{C}\). What was the range of temperatures on Monday in Fermatville?
If \(x=-2\) and \(y=-1\), the value of \((3x+2y)-(3x-2y)\) is
How many integers are greater than \(\frac{5}{7}\) and less than \(\frac{28}{3}\)?
The symbols \(\heartsuit\) and \(\nabla\) represent different positive integers less than 20.If \(\heartsuit \times \heartsuit \times \heartsuit = \nabla\), what is the value of \(\nabla \times \nabla\)?
In the diagram, points \(R\) and \(S\) lie on \(PT\) and \(PQ\), respectively. If \(\angle PQR = 90^\circ\), \(\angle QRT = 158^\circ\), and \(\angle PRS = \angle QRS\), what is the measure of \(\angle QSR\)?
Bev is driving from Waterloo, ON to Marathon, ON. She has driven 312 km. She has 858 km still to drive. How much farther must she drive in order to be halfway from Waterloo to Marathon?
For what value of \(k\) is the line through the points \((3,2k+1)\) and \((8,4k-5)\) parallel to the \(x\)-axis?
In the diagram, \(PQRS\) is a rectangle with \(SR=15\). Point \(T\) is above \(PS\) and point \(U\) is on \(PS\) so that \(TU\) is perpendicular to \(PS\). If \(PT=10\) and \(US=4\) and the area of \(PQRS\) is 180, what is the area of \(\triangle PTS\)?
In the diagram, the number line between \(-2\) and \(3\) is divided into 10 equal parts. The integers \(-1\), \(0\), \(1\), \(2\) are marked on the line as are the numbers \(A\), \(x\), \(B\), \(C\), \(D\), \(E\).
A bag contains 8 red balls, a number of white balls, and no other balls. If \(\frac{5}{6}\) of the balls in the bag are white, then the number of white balls in the bag is
In the given \(5 \times 5\) grid, many squares can be formed using the grid lines.
How many of these squares contain the shaded \(1\times 1\) square?
A digital clock shows the time 4:56. How many minutes will pass until the clock next shows a time in which all of the digits are consecutive and are in increasing order?
The line with equation \(y=x\) is translated 3 units to the right and 2 units down. What is the \(y\)-intercept of the resulting line?
Francesca put the integers \(1,2,3,4,5,6,7,8,9\) in the nine squares in the grid. She put one integer in each square and used no integer twice. She calculated the product of the three integers in each row and wrote the products to the right of the corresponding rows. She calculated the product of the integers in each column and wrote the products below the corresponding columns. Finally, she erased the integers from the nine squares. Which integer was in the square marked \(N\)?
Points \(P\) and \(Q\) are two distinct points in the \(xy\)-plane. In how many different places in the \(xy\)-plane can a third point, \(R\), be placed so that \(PQ=QR=PR\)?
In the diagram, square \(PQRS\) has side length 2. Points \(M\) and \(N\) are the midpoints of \(SR\) and \(RQ\), respectively.
Suppose that \(m\) and \(n\) are positive integers with \(\sqrt{7+\sqrt{48}} = m+\sqrt{n}\). The value of \(m^2+n^2\) is
Radford and Peter ran a race, during which they both ran at a constant speed. Radford began the race 30 m ahead of Peter. After 3 minutes, Peter was 18 m ahead of Radford. Peter won the race exactly 7 minutes after it began. How far from the finish line was Radford when Peter won?
For how many positive integers \(x\) is \((x-2)(x-4)(x-6) \cdots (x-2016)(x-2018) \leq 0\)?
(The product on the left side of the inequality consists of 1009 factors of the form \(x-2k\) for integers \(k\) with \(1 \leq k \leq 1009\).)
A sequence has terms \(a_1,a_2,a_3,\ldots\). The first term is \(a_1=x\) and the third term is \(a_3=y\). The terms of the sequence have the property that every term after the first term is equal to 1 less than the sum of the terms immediately before and after it. That is, when \(n \geq 1\), \(a_{n+1} = a_n + a_{n+2} -1\). The sum of the first 2018 terms in the sequence is
Suppose that \(k>0\) and that the line with equation \(y = 3kx + 4k^2\) intersects the parabola with equation \(y = x^2\) at points \(P\) and \(Q\), as shown.
Suppose that \(a\), \(b\) and \(c\) are integers with \((x-a)(x-6) + 3 = (x+b)(x+c)\) for all real numbers \(x\). The sum of all possible values of \(b\) is
Wayne has 3 green buckets, 3 red buckets, 3 blue buckets, and 3 yellow buckets. He randomly distributes 4 hockey pucks among the green buckets, with each puck equally likely to be put in each bucket. Similarly, he distributes 3 pucks among the red buckets, 2 pucks among the blue buckets, and 1 puck among the yellow buckets. Once he is finished, what is the probability that a green bucket contains more pucks than each of the other 11 buckets?
For each positive digit \(D\) and positive integer \(k\), we use the symbol \(D_{(k)}\) to represent the positive integer having exactly \(k\) digits, each of which is equal to \(D\). For example, \(2_{(1)}=2\) and \(3_{(4)} = 3333\). There are \(N\) quadruples \((P,Q,R,k)\) with \(P\), \(Q\) and \(R\) positive digits, \(k\) a positive integer with \(k \leq 2018\), and \(P_{(2k)} - Q_{(k)} = \left(R_{(k)}\right)^2\). The sum of the digits of \(N\) is
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