Natural numbers + reason - practice problems
Number of problems found: 540
- Numbers 22811
How many digits are in the numbers 1 to 100? - Questions 6898
Write a word problem with three questions for numbers 2 and 6. - Four-digit number
For a four-digit number abcd, ab: bc = 1:3 and bc: cd = 2:1 (ab, bc, and cd are two-digit numbers from digits a, b, c, d). Find this number(s). - Contains 66184
Which natural number contains 12 thousand, 15 hundred, 21 tens, and 11 units? - Signs 40171
Fill in the signs to apply 5 5 5 5 5 = 14 - Classmates
Roman is ranked 12th highest and eleventh lowest pupil. How many classmates does Roman have? - Expressions 62294
Express the numbers 18, 28, 32, 40, 48, and 200 as numerical expressions composed of exactly five pairs. - Mystery number
A mystery number is between 800 and 920. No digits are the same. The difference between the numbers is 5. What is the mystery number? - Single-digit 2805
Which two single-digit numbers have the sum and product of the same number? - Letters
ABC + DEF = GHIJ replace letters with numbers so that the sum is correct (different letters = different numbers) - Children 5352
father + mom = children How much does the task have to be solved? - Inhabitants 5458
The population of the village rounding up to hundreds is 5600. Most how many inhabitants can live in this village? - Identity
123456789 = 100 Correct the given identity/equation only using three plus or minus signs. - Sum and rounding
I know two numbers whose sum is 20. When each round and then added together, I get the 30. What are these numbers? - Eight chairs
There are eight chairs by the table, and one more child sitting on each one. There are two times more girls than boys. How many girls and how many boys can there be? - Organizers 45351
The ski organizers have to print the start numbers from 1 to 45. How many times do they use the number 3 when printing? - White balls
I have three white balls and five red balls in my pocket. How many balls do I have to remove from the bag to ensure the pulled-out ball is red? - Big number
How many ones (digits) does the number 12345678910111213141516 ... 4647484950 contain? Did we write all natural numbers from 1 to 50 in a row? - Expressions 62284
Express the numbers 18, 28, 32, 40, 48, and 200 as numeric expressions composed of the digits 5. - Six-eights
Six-eights of the one hundred pupils joined the Math Glee club. If the Math Glee club members were grouped into three, how many members were in each group?
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