# Variations + natural numbers - math problems

#### Number of problems found: 33

• Big numbers How many natural numbers less than 10 to the sixth can be written in numbers: a) 9.8.7 b) 9.8.0
• Three-digit How many three-digit natural numbers are greater than 321 if no digit in number repeated?
• Digits How many natural numbers greater than 4000 which are formed from the numbers 0,1,3,7,9 with the figures not repeated, B) How many will the number of natural numbers less than 4000 and the numbers can be repeated?
• Number 4 Kamila wrote all natural numbers from 1 to 400 inclusive. How many times did she write the number 4?
• Dd 2-digit numbers Find all odd 2-digit natural numbers compiled from digits 1; 3; 4; 6; 8 if the digits are not repeated.
• A three-digit numbers Determine the total number of positive three-digit numbers that contain a digit 6.
• Bookshelf and books How many ways can we place 7 books on a bookshelf?
• 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?
• Digits How many five-digit numbers can be written from numbers 0.3,4, 5, 7 that is divided by 10 and if digits can be repeated.
• No. of divisors How many different divisors have number ??
• Three digits number How many are three-digit integers such that they no digit repeats?
• To improve To improve her handwriting Paula practices writing the numbers 1 to 200 in words. How many times will she have written the word "one" in all?
• Numbers How many different 3 digit natural numbers in which no digit is repeated, can be composed from digits 0,1,2?
• Graduation party There are 15 boys and 12 girls at the graduation party. Determine how many four couples can be selected.
• Boys and girls There are 20 boys and 10 girls in the class. How many different dance pairs can we make of them?
• Coffe cups We have 4 cups with 4 different patterns. How many possible combinations can we create from 4 cups?
• Year 2020 The four-digit number divided by 2020 gives a result of 1, **. (Can not be in form 1,*0. ) Write all the options.
• How many 4 How many 4 digit numbers that are divisible by 10 can be formed from the numbers 3, 5, 7, 8, 9, 0 such that no number repeats?
• Pages counting There are pages numbered from 2 to 104 in the book. How many digits have to be printed to number the pages?
• Seedbeds The father wants to plant 2 seedbeds of carrot and 2 seedbeds of onion. Use a tree chart to find how many different options for placing the seedbeds he has.

Do you have an interesting mathematical word problem that you can't solve it? Submit a math problem, and we can try to solve it.

We will send a solution to your e-mail address. Solved examples are also published here. Please enter the e-mail correctly and check whether you don't have a full mailbox.

Please do not submit problems from current active competitions such as Mathematical Olympiad, correspondence seminars etc...
See also our variations calculator. Variations - math problems. Natural numbers - math problems.