Reason - high school - practice problems - page 3 of 31
Number of problems found: 603
- Tricolors
From the colors - red, blue, green, black, and white, create all possible tricolors. - Circles
How many different circles are determined by 11 points at the plane if 7 of them lie in a straight line? - Variations 70724
If we increase the number of elements by 2, the number of variations of the second class without repetition increases by 22. How many elements do we have initially? - Third-class 8334
If we add one element to set A, the number of third-class variations increases two times. How many elements did the set initially contain? - Great-grandfather 6705
Monika was born on the day his great-grandfather was 90 years old. How old is Monika if the product of their ages is 1000? - Determined 3570
There are 12 points in space, with no three lying on a straight line. How many different planes are determined by these points? - How many 23
How many times should a dice be rolled to obtain a most likely number of 2 points on it to be equal to 32? - Balls in row
Calculate the number of ways of placing four black balls, four turquoise balls, and five gold balls in a row. - A bag
A bag contains nine blue marbles and one green marble. What is the probability of drawing a blue marble followed by a green marble without replacing the first marble before drawing the second marble? - Sum of the seventeen numbers
The sum of the 17 different natural numbers is 154. Determine the sum of the two largest ones. - Coordinates of square vertices
I have coordinates of square vertices A / -3; 1/and B/1; 4 /. Find coordinates of vertices C and D, C and D. Thanks, Peter. - Glasses
There are 36 pupils in the class. Nine girls wear glasses. Boys with glasses are five less than girls without glasses. Boys without glasses are two times more than girls without glasses. How many boys and how many girls? - Progression
-12, 60, -300,1500 need the next 2 numbers of pattern - Two aces
From a 32-card box, we randomly pick 1 card and then two more cards. What is the probability that the last two drawn cards are aces? - Big number
Dagmar typed numbers on the computer (without spaces) 45678910111213141516... Which number did she write in the third place? - Three ints
The sum of three consecutive integers is 2016. What numbers are they? - Seating
How many ways can 7 people sit on 5 numbered chairs (e. g., seat reservation on the train)? - Probability 83133
The mobile PIN has 4 characters. What is the probability that the PIN contains the number 7 and ends with the number 5? - Probability 82744
Ten books are placed randomly on one shelf. Find the probability that certain three books are placed next to each other. - Questions 81676
You will learn 50% of the 30 questions. If I get 4 questions, I'll know 3.
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