Combinatorics - math word problems - page 21 of 57
Number of problems found: 1135
- A three-digit numbers
Determine the total number of positive three-digit numbers that contain a digit 7. - Two dice
What is the probability that when the roll of two identical dice is the sum of points 7? - Digits
How many odd four-digit numbers can we create from digits 0, 3, 5, 6, and 7? (a) the figures may be repeated (b) the digits may not be repeated - Covid-19 spread
A Street has 13 houses in a row. Some residents in the first house tested positive for Covid-19. The virus spreads in 2 ways: It can spread to the next house or jump directly to the third house. Residents of house two can get infected in only one way, hou - Ordered pairs
Given: Set T = {(1,2), (2,3), (3,4), (4,5), (5,5), (6,7), (6,6), (7,8), (8,9), (9,9), (9, 10), (11,12), (12,13), (13,14), (15,16), (16,16), (17,18), (18,19), (20,21)} Find the probability of having an ordered pair wherein the second element is greater tha - Number divisibility probability
What is the probability that a randomly written two-digit number from number 20 to number 99 will be divisible by 11, the power of number 3, or a prime number? - Drawing from a hat
When drawing numbers from a hat from 1 to 35, we select randomly given numbers. What is the probability that the drawn numbers will be divisible by 8 and 2? - No. of divisors
How many different divisors have number 13 4 * 2 4? - Independent term
Find the term independent of x in the expansion of (4x³+1/2x)8 - What fraction
What fraction of numbers 1 to 30 is prime? - Blocks
There are nine interactive basic building blocks of an organization. How many two-block combinations are there? - Five-digit odd numbers
How many five-digit odd numbers exist? - Seagull
An artificially created island in the shape of a circle with a radius of 50 m is overgrown with grass. The only exception is a landing area for helicopters in the shape of a rectangle measuring 15 m and 8 m. What is the probability that the flying seagull - The big clock
The hands of a clock stop at a random moment. What is the probability that: a) the hour hand shows a time between 1:00 and 3:00? b) the minute hand is in the same region as the hour hand as described in part a)? c) the clock shows a time between 21:00 and - Draw a triangle
We have line segments with lengths of 3 cm, 5 cm, 6 cm, 7 cm, and 9 cm. What is the probability in % that if I randomly select three of them, I will be able to draw a triangle? - Probability
A chessboard consists of 8×8 squares forming a square. A rook is unthreatened if there is no other rook in the same row or column. What is the probability that when 8 rooks are placed on a chessboard, none of them threatens another (they each stand in a d - Count of triangles
On each side of an ABCD square is 10 internal points. Determine the number of triangles with vertices at these points. - N points on the side
An equilateral triangle A, B, and C on each of its inner sides lies N=13 points. Find the number of all triangles whose vertices lie at given points on different sides. - Triangles - count
Find out how many triangles you create from lines 7 dm, 5 dm, 10 dm, 12 dm, and 15 dm long. - N-gon
How many diagonals does a convex 30-gon have?
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