# 2016 Grade 7 Math Challenge Elimination Questions with answers – Part 2

This is the 2016 MTAP Grade 7 Math Challenge questions 26 to 50 with answer key. More reviewers can be found on the Past Tests and All Posts pages.

26.) The sum of the square roots of two positive integers is $54$. If the two integers differ by $54$, what are the integers?

27.) A worm crawls 7.5 inches in 80 seconds. What is its speed in feet per hour?

28.) By how much is $(3x - 5)(x + 2)$ greater than $(x + 4)(2x - 1)$?

29.) A game consists of drawing a number from 1 – 20. A player wins if the number drawn is either a prime number or a perfect square. What is the probability of winning in this game?

30.) The number of boys in a class is equal to the number of girls. Nine boys are absent today, and this leaves twice as many girls as boys in the classroom. How many students belong to the class?

31.) A square region is removed from a rectangular region. Which of the following can be true?

(a) The perimeter is decreased.
(b) The perimeter is not changed.
(c) The perimeter is increased.

32.) A bag contains 5 black, 5 red, 6 blue, 6 green, 7 white, 8 yellow, and 10 orange beads. At least how many beads must be drawn from the bag to ensure that at least 3 beads of the same color are chosen?

33.) How many positive numbers less than $1000$ are divisible by $6$ but not by $5$?

34.) A 4cm × 5cm × 7cm rectangular prism is painted on all faces. If the prism is cut into 1cm × 1 cm × 1 cm cubes, how many cubes do not have paint on any of its sides?

35.) Andrew is 5 years old and Charlie is 26. In how many years will Charlie be 21 times as old as 2 Andrew?

36.) A car is driving along a highway at 55 kph. The driver notices a bus, 1 km behind. The bus 2 passes the car one minute later. What was the speed of the bus?

37.) With what polynomial must $8x^5 - 10x^3 + 2x + 5$ be divided to get a quotient of $4x^2 - 3$ and a remainder of $5 - x$?

38.) The volume of a sphere is equal to its surface area. What is the diameter of the sphere?

39.) If $3A54B10$ is divisible by $3304$, what are the values of $A$ and $B$?

40.) Find the solution set: $|5 - 2x| < 194$.

41.) If $47A29694$ is equal to the square of $3(721 + A)$, find the digit $A$.

42.) Consider the sequence 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, …. How many numbers in the sequence are needed so that the sum of the reciprocals is 100?

43.) If $n$ is a positive odd integer, which of the following is a perfect square: $2^{n^2}$, $25^{(3n+2)}$, $7^{n(n+1)}$?

44.) The sum of the first $50$ odd integers is $2500$. What is the sum of the next $50$ odd integers?

45.) Felix has an average of $90$ in five tests, each test with $100$ points. What is the lowest possible score Felix could have gotten in a test?

46.) In square $ABCD$, $P$ is the midpoint of $AB$ and $Q$ is the midpoint of $BC$. What percent of the area of $ABCD$ is the area of △PQD?

47.) If $1 < x < \frac{9}{8}$,which is bigger, $\sqrt{3x}$ or $\sqrt{2x}$?

48.) Find the least positive integer that leaves remainder of 1, 2, and 3 when divided by 3, 5, and 7, respectively.

49.) Find all points $x$ on the real number line such that the sum of the distances from $x$ to $4$ and from $x$ to $-4$ is $12$.

50.) If $11n$ leaves a remainder of $6$ when divided by $7$, what is the remainder when $5n$ is divided by $7$?

26.) 4 and 9
27.) $\frac{225}{8} = 28.125 ft/hr$
28.) $x^2 - 6x - 6$
29.) $\frac{3}{5} or 60%$
30.) 36
31.) (b) and (c)
32.) 15
33.) 133
34.) 30
35.) 9
36.) 85 kph
37.) $2x^3 - x$
38.) 6
39.) A = 0 and B = 8
40.) (-7, 12) or (x | -7 < x < 12)
41.) 8
42.) 5050
43.) $7^{n(n+1)}$
44.) 7500
45.) 45
46.) 37.5%
47.) $\sqrt{3x}$
48.) 52
49.) 6 and -6
50.) 4

View Part 1 here: 2016 Grade 7 Math Challenge Elimination Questions with answers – Part 1