# Variations + reason - math problems

#### Number of problems found: 55

• Four swords
Obelix has three helmets, four swords, and five shields. How many words must make at the blacksmith forge Metallurgix to be able to walk another 90 days in unique armor?
• Combinations of sweaters
I have 4 sweaters two are white, 1 red and 1 green. How many ways can this done?
• Dices throws
What is the probability that the two throws of the dice: a) Six falls even once b) Six will fall at least once
• Eight blocks
Dana had the task to save the eight blocks of these rules: 1. Between two red cubes must be a different color. 2. Between two blue must be two different colors. 3. Between two green must be three different colors. 4. Between two yellow blocks must be four
• Variations 3rd class
From how many elements we can create 13,800 variations 3rd class without repeating?
• Pupils
Four pupils is going via dark hall. Start at one side and have to get to the other side for 17 minutes. They have only one lamp for the trip. The corridor is narrow, they can therefore go up two pupils at a time and go at the slower speed. Each pupil went
• Three-digit numbers
How many three-digit numbers are from the numbers 0 2 4 6 8 (with/without repetition)?
• The camp
At the end of the camp a 8 friends exchanged addresses. Any friend gave remaining 7 friends his card. How many addresses they exchanged?
• Three digits number
From the numbers 1, 2, 3, 4, 5 create three-digit numbers that digits not repeat and number is divisible by 2. How many numbers are there?
• Three digits number
How many are three-digit integers such that they no digit repeats?
• Chess
How many different ways can initiate a game of chess (first pass)?
• Seven-segmet
Lenka is amused that he punched a calculator (seven-segment display) numbers and used only digits 2 to 9. Some numbers have the property that their image in the axial or central symmetry was again give some number. Determine the maximum number of three-di
• Training
The table contains tennis training schedule for Saturday's younger students during the winter indoor season. Before the start of the summer season is preparing a new training schedule. Tomas Kucera will be able to practice only in the morning, sisters Kov
• Toys
3 children pulled 12 different toys from a box. Many ways can be divided toys so that each child had at least one toy?
• Seating
How many ways can 6 people sit on 6 numbered chairs (e. g. , seat reservation on the train)?

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See also our variations calculator. Variations - math problems. Reason - math problems.