Reason - 9th grade (14y) - math problems
Number of problems found: 457
On coins found was stated that from the year 87 BC. It is right?
- One three
We throw two dice. What is the probability that max one three falls?
They have together 39 years - he has 2 times as she was when he was equal as she has today ....
How many ways can 6 people sit on 6 numbered chairs (e. g. , seat reservation on the train)?
- Two integers
Two integers, a and b, have a product of 36. What is the least possible sum of a and b?
- Six on dice
What is the probability that when throwing two dice will fall at least one six?
How probable is a randomly selected three-digit number divisible by five or seven?
Write all the integers x divisible by seven and eight at the same time for which the following applies: 100
How many different ways can initiate a game of chess (first pass)?
- Unknown number 23
Find 2/3 of unknown number, which is two thirds of the 99.
- The dice
What is the probability of events that if we throw a dice is rolled less than 6?
- Two-element combinations
Write all two-element combinations from elements a, b, c, d.
From the colors - red, blue, green, black and white, create all possible tricolors.
- Probably member
Look at the series 2,6,25,96,285, ? What number should come next?
Susan is 3 years and as she will be old as Teodor now him will be 11. How old is Teodor today?
- Three numbers
What is three numbers which have the property: the sum of the reciprocals of the first and second numbers is 12/7, the first and third 11/24 and the second and the third 3/8.
- Combinations of sweaters
I have 4 sweaters two are white, 1 red and 1 green. How many ways can this done?
- Three ints
The sum of three consecutive integers is 2016. What numbers are they?
Mom is 42 years old and her daughters 13 and 19. After how many years will mother as old as her daughter together?
In how many points will intersect 14 different lines, where no two are parallel?