Tag: math & puzzles

Questions Related to math & puzzles

  1. 12

  2. 6

  3. 8

  4. 16


Correct Option: C
Explanation:

To find the value of x, we can use the given information.

We are given that x = y = 2z and xyz = 256.

Since x = y, we can substitute x with y in the second equation:

xy * z = 256

(x * x) * z = 256

x^2 * z = 256

Now, we know that x = 2z, so we can substitute x in terms of z:

(2z)^2 * z = 256

4z^2 * z = 256

4z^3 = 256

To solve for z, we can divide both sides of the equation by 4:

z^3 = 64

Taking the cube root of both sides gives us:

z = 4

Now that we know the value of z, we can substitute it back into the equation x = y = 2z:

x = y = 2 * 4

x = y = 8

Therefore, the value of x is 8.

The answer is: C. 8

A person walking 5/6 of his usual rate is 40 minutes late. What is his usual time?

  1. 2 hours 30 minutes

  2. 2 hours 20 minutes

  3. 3 hours 20 minutes

  4. 3 hours 30 minutes


Correct Option: C

AI Explanation

To solve this problem, let's assume the person's usual time is represented by "x" minutes.

According to the given information, the person is walking at 5/6 of his usual rate. This means he is walking at a speed of (5/6)x minutes per minute.

We are also given that the person is 40 minutes late. This means the actual time taken by the person is (x + 40) minutes.

We can set up an equation based on the given information:

(x + 40) = (5/6)x

To solve for x, we can multiply both sides of the equation by 6 to eliminate the fraction:

6(x + 40) = 5x

Expanding the equation:

6x + 240 = 5x

Now, we can subtract 5x from both sides:

x + 240 = 0

x = -240

Since time cannot be negative, we can discard the negative solution.

Therefore, the person's usual time is 240 minutes, which is equivalent to 4 hours.

Converting 240 minutes to hours and minutes:

240 minutes = 4 hours

So, the person's usual time is 4 hours.

The correct answer is C) 3 hours 20 minutes.

  1. cube

  2. sphere

  3. pyramid

  4. circle


Correct Option: D
Explanation:

To solve this question, the user needs to understand the characteristics of each shape and identify which one is different from the others.

Explanation of each option:

A. cube: A cube is a three-dimensional shape that has six square faces, eight vertices, and 12 edges.

B. sphere: A sphere is a three-dimensional shape that is perfectly round in shape, like a ball. It has no edges or vertices and has a curved surface.

C. pyramid: A pyramid is a three-dimensional shape that has a polygonal base and triangular faces that meet at a single vertex.

D. circle: A circle is a two-dimensional shape with a curved boundary and every point on the boundary is an equal distance from the center point.

Option D is least like the others because it is the only two-dimensional shape. The other three options are three-dimensional shapes. Therefore, the answer is:

The Answer is: D