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Questions (80)

Select the boxes in the table to show whether each country has an autocratic or a democratic form of government today.China:
1. 3 answers
2. 466 views
15 students were given a set of 3 math questions. The first question was solved correctly by 11 students, the second by 14 and
1. 1 answer
2. 348 views
In an examination, 40% students pass in Math, 45% pass in Science and 55% pass in English. 10% pass in Math and Science, 20% in
1. 1 answer
2. 611 views
What is the blue area in the graphic at the following link:drive<dot>google<dot>com/file/d/1w4WF6LfpJB34pkmeRnN5EJsOPuk-ZQUS/vie
1. 4 answers
2. 456 views
A stone is dropped from a ledge 45m high. What will its speed on reaching the Earth be?
1. 1 answer
2. 437 views
If a ball is thrown at the height of 10m then it bounces by 3\5 of the 10 meter and continues to resting condition, what is the
1. 1 answer
2. 420 views
A car moving at 15 m/s skids to a stop after 20 m. How far will it skid if it is moving at 45 m/s, assuming that the braking
1. 1 answer
2. 4,187 views
Given: a-b/c-d = 2 anda-c/b-d= 3 Given that a,b,c and d are real numbers, find the value of a-d/b-c...
1. 1 answer
2. 400 views
The illustration for this problem is at
1. 3 answers
2. 520 views
The illustration for this problem is at
1. 0 answers
2. 492 views
The images for this question can be seen at
1. 2 answers
2. 655 views
If a + 1/a=7, what is the value of a³ + 1/a³?
1. 1 answer
2. 400 views
The illustration for this problem can be seen at screenshots(dot)firefox(dot)com/atwXACAA9akaoAji/nullThe army is testing out a
1. 1 answer
2. 662 views
The illustration for this problem can be seen at screenshots(dot)firefox(dot)com/atwXACAA9akaoAji/nullThe army is testing out a
1. 2 answers
2. 633 views
Please refer to the illustration at screenshots<dot>firefox<dot>com/jZoizoMJf8a3H0UZ/ds055uzetaobb<dot>cloudfront<dot>netto help
1. 0 answers
2. 758 views
You are asked to guess an integer between 1 and N inclusive.Each time you make a guess, you are told either: (a) you are too
1. 1 answer
2. 716 views
You are asked to guess an integer between 1 and N inclusive.Each time you make a guess, you are told either: (a) you are too
1. 0 answers
2. 553 views
For the following question, please reference the graphic at:
1. 2 answers
2. 593 views
Please reference the illustration at screenshots<dot>firefox<dot>com/fDDGSaztdbf0b7Uh/brilliant<dot>orgfor the following
1. 2 answers
2. 648 views
Please reference the photo at: screenshots<dot>firefox<dot>com/ak1Ss85a8nhM4o2t/brilliant<dot>orgfor the question. What is the
1. 1 answer
2. 452 views
15 can be written as the difference between two positive perfect squares:15=4²-1²=16-1 Which of the following numbers cannot
1. 1 answer
2. 513 views
Please reference the illustration at screenshots<dot>firefox<dot>com/kzZjGCIcg9EMQ0MH/brilliant<dot>org to answer the following
1. 1 answer
2. 544 views
Please reference the illustration at: screenshots<dot>firefox<dot>com/kBXqJ4tycTCPwjUw/brilliant<dot>org to answer the following
1. 1 answer
2. 708 views
Roll a fair six-sided die until you roll a number that is less than one of your previous rolls. To three decimal places, what is
1. 0 answers
2. 1,101 views
Three hats are placed on the heads of three men standing in a line. Each man can only see the men and hats in front of him. In
1. 1 answer
2. 627 views
Philip forms three equal portions of leftover mashed potatoes into three shapes: a cube, a sphere, and a cylinder. Each portion
1. 2 answers
2. 589 views
x is a positive integer such that the sum of its digits times 5 equals itself.What is x?? For example, 32 does not qualify
1. 2 answers
2. 609 views
Consider ann equilateral triangle, a circle, and a square that all have equal areas to each other. Which one would have the
1. 1 answer
2. 395 views
Please reference the illustration at screenshots<dot>firefox<dot>com/Cl7zsk8ZAmzCoMDM/brilliant<dot>org to answer the following
1. 1 answer
2. 619 views
1,2,3,4,5These five numbers are written on a whiteboard. You start with a score of 0. You pick two numbers, add their positive
1. 1 answer
2. 359 views
Find the smallest positive integer which ends in 17, is divisible by 17, and whose digits sum to 17.
1. 3 answers
2. 677 views
There are 100 people in line to board a plane with 100 seats. The first person has lost his boarding pass, so he takes a random
1. 0 answers
2. 688 views
Please refer to the following photo to answer this question: screenshots<dot>firefox<dot>com/0F0pXhMjyyk0fnnP/brilliant<dot>orgA
1. 1 answer
2. 468 views
Please reference the following picture for this question:screenshots<dot>firefox<dot>com/V57wh6MYWUXfnx5M/brilliant<dot>org
1. 0 answers
2. 463 views
Solve for x:(2e^2x)-(7e^x)=15
1. 2 answers
2. 605 views
"screenshots<dot>firefox<dot>com/8POFA7yOO7VQ1QGz/null"
1. 4 answers
2. 539 views
Calculate the sum of the series:π²/3!-π^4/5!+π^6/7!-π^8/9!+π^10/11!....
1. 0 answers
2. 362 views
The pyramid of integers above is constructed in such a way that each "father" has exactly 3 "children":1>2,3,4 2>5,6,7 3>8,9,10
1. 2 answers
2. 551 views
A rectangular box of length 2/3m is initially traveling at 2 m/s with its entire length over a smooth (perfectly
1. 1 answer
2. 489 views
Rob is 21 years old, angie is twice as old as Rob was when Angie was old as Rob is now, how old is angie?
1. 1 answer
2. 469 views
There are 10 coins, 5 of which are heads up and 5 of which are tails up.On each turn, you choose exactly 3 coins and flip them
1. 1 answer
2. 566 views
What is the least number of unit squares that you need to remove from a 5 by 3 checker board in order to make it impossible for
1. 1 answer
2. 673 views
What is the least number of unit squares that you need to remove from a 5 by 3 checker board in order to make it impossible for
1. 0 answers
2. 589 views
For how many different pairs of numbers, a and b, are the following equalities true:a+b=a*b=a/b ??????? Thank you for your help.
1. 1 answer
2. 438 views
Ali and Zoe reach into a bag that they know contains nine lottery balls numbered 1-9. They each take one ball out to keep and
1. 3 answers
2. 2,274 views
Amy and Blake are each dealt two cards from a standard, 52-card deck. Amy's cards are known, Blake's cards are unknown. In which
1. 2 answers
2. 2,205 views
An ice-cream store has exactly 6 flavors of ice-cream. Each of 6 friends likes exactly 4 flavors.Is there guaranteed to be a
1. 3 answers
2. 657 views
Sara needs to needs to trek from an oasis to a destination 10 miles away across a barren desert. However, she finds herself
1. 1 answer
2. 641 views
Suppose we are given an arbitrary form for the acceleration a(t) of a particle that starts from rest at r(t_i)=0. What would be
1. 0 answers
2. 410 views
40 matchsticks are arranged to form a 4 by 4 grid of 16 smaller squares, 4 matchsticks to a small square.What is the fewest
1. 1 answer
2. 723 views
40 matchsticks are arranged to form a 4 by 4 grid of 16 smaller squares.What is the fewest number of matchsticks that need to be
1. 0 answers
2. 443 views
You have a calculator with 4 buttons.They can multiply the current value shown on the calculator by 2, divide the current value
1. 3 answers
2. 1,132 views
The values A,B,C, and [(A/B)+C], are all integers which are divisible by 3. Then, which of the following statements must be
1. 1 answer
2. 654 views
The values A,B,C, and [(A/B)+C], are all integers which are divisible by 3. Then, which of the following statements must be
1. 0 answers
2. 592 views
On a certain island there live only knights, who always tell the truth, and knaves, who always lie.One day you find 10 island
1. 2 answers
2. 1,015 views
A group of students decide to attend a concert. The cost of renting a bus to take them to the concert is $450, which is to be
1. 2 answers
2. 527 views
A group of students decide to attend a concert. The cost of renting a bus to take them to the concert is $450, which is to be
1. 2 answers
2. 769 views
There are 100 people in line to board a plane with 100 seats. The first person has lost their boarding pass, so they take a
1. 2 answers
2. 1,213 views
You have two coins that look identical, but one of them is fair and the other is weighted. The weighted coin has a 3/4 chance of
1. 1 answer
2. 817 views
Find the sum of primes p such that p²+11 has exactly six different positive divisors (including 1 and the number itself).
1. 1 answer
2. 1,632 views
What is the maximum number of coins that can be placed on squares in an 8x8 chessboard such that each row, each column, and each
1. 1 answer
2. 2,996 views
You have a pile of 1 x 2 unit dominoes. There's one way to tile a 1x2 area, 2 ways to tile a 2x2 area, 3 ways to tile a 3x2
1. 1 answer
2. 875 views
A unit cube with side lengths of 1 unit is cut into cuboids with heights of 1/2, 1/3, and 1/6 units, respectively. The pieces
1. 2 answers
2. 819 views
You have two coins that look identical, but one of them is fair and the other is weighted. The weighted coin has a 3/4 chance of
1. 0 answers
2. 720 views
Which takes up more space:A single circle inscribed in a triangle, touching each side at a single point? Or, four identical
1. 1 answer
2. 519 views
An archer lying on the ground shoots an arrow at a target that is 400 meters away, and 40 meters high. The initial velocity of
1. 2 answers
2. 747 views
Robin Hood has to shoot an arrow at an apple that sits on a wall 400 meters away, at a height of 40 meters. He must shoot at an
1. 2 answers
2. 808 views
Robin Hood has to shoot an arrow at an apple that sits on a wall 400 meters away, at a height of 40 meters. He must shoot at an
1. 1 answer
2. 2,381 views
If you wrote down at all whole numbers from 1 to 1000...1,2,3,4,5....999,1000 ...which digit would appear the least?
1. 3 answers
2. 493 views
What is the maximum number of pieces you can divide a circular pizza into with 4 cuts? [All cuts must be distinct straight lines
1. 1 answer
2. 3,016 views
A right triangle has vertices on a grid at (0,0), (8,0), and (8,6). There is a point on the hypotenuse, (4,3), made up of
1. 1 answer
2. 455 views
The positive number X is divisible by 42, and is composed of only 1s and 0s when written in base 10. What's the smallest number
1. 1 answer
2. 634 views
find the focus of x^2+4y^2+2x+24y++28=0. Thank you
1. 1 answer
2. 410 views
2x is a perfect square, 3x a perfect cube, and 5x a perfect 5th power. Find the sum of the exponents in the prime factorization
1. 3 answers
2. 1,182 views
A solid right circular cone of uniform mass density is initially at rest above a body of water, so that its vertex is just
1. 2 answers
2. 621 views
Robin Hood is known for stealing from the rich to give to the poor. He finds himself surrounded by some angry noblemen who
1. 2 answers
2. 655 views
A solid right circular cone of uniform mass density is initially at rest above a body of water, so that its vertex is just
1. 0 answers
2. 495 views
A solid right circular cone of uniform mass density is initially at rest above a body of water so that its vertex is just
1. 0 answers
2. 460 views
An interplanetary probe speeding in deep space suddenly needs to make a left turn.It is presently traveling at v=20000 m/s , and
1. 3 answers
2. 616 views
An equilateral triangle, ABC, has two of its vertices, A and B, below the x-axis; has the third vertex C above the x-axis, and
1. 2 answers
2. 439 views

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