Natural numbers - practice for 9 year olds
Number of problems found: 67
- Pants
Peter bought 58 pairs of pants, 18 of which were torn. How many pants were not torn, which he had? - Library 4
Library A has a total collection of 250 books. Library B has 100 more books than Library A, and Library C has twice as many books as the combined number of books in Library A and B. What is the total number of books in libraries A, B and C? - 52 cards
A hand of five cards is dealt from a pack of 52 playing cards. How many different hands can be dealt that contain three aces? - Dividend, divisor and quotient
Hiba got the answer of 72 after dividing two numbers. If the divisor was 14, what was the dividend? - Divide 37
Divide 2406 cherries equally among 3 children. How many each got? - Lucas
Lucas is trying to find 6×15. He knows that 3×15=45. He also knows that 6=2×3. How can Lucas use 3×15 to help him find 6×15? - Positive integer integral
How many different sets of a positive integer in the form (x, y, z) satisfy the equation xyz=1400? - Simultaneously 80392
Dulikovci, Elikovci, Filikovci, and Galikovci visited each other often last month. Each family visited each family exactly once. How many visits did all four families make together? If two families came to visit one family simultaneously, count it twice. - Diala
Diala bought some books in 2012, and then during 2013, she bought 3 times as many books as she bought in 2012. Diala bought 48 books during these two years. Make a diagram to represent the given. How many books did Diala buy each year? - Number 72054
I think the number. Its value equals the sum of three times the number 12 and the number 9. What number do I think? - A machine 2
A machine shop ordered the following amounts of cold, rolled steel: 1714 lb., 597 lb., and 1043 lb. How many pounds of steel were ordered? - Green and red cubes
There are five green cubes (numbered 1 - 5) and four red cubes (numbered 1 - 4). How many ways can the cubes fit in a box that only needs two green and three red cubes? - Bicycles 66224
Mr. Veselý sells bicycles. In one month, he sold 14 bikes for 4530 CZK. How many crowns did he earn per round? - Beginning 66104
The kangaroo always jumps three steps up. Each time he jumps, the bunny jumps down two steps. On which stairs will they meet? The kangaroo stands on the 1st step at the beginning and the bunny on the 100th. - Competitors 64684
Six competitors reached the finish line of the 100-meter run. The following applies to their order: Cyril finished before Filip but behind Boris. Boris finished behind Andrej. Dušan was in front of Andrej but behind Emil. What was the order of the first t - Triangle from sticks
Bob the boulder has many sticks of lengths 3.5 and 7. He wants to form triangles, each of whose edges consists of exactly one stick. How many non-congruent triangles can be formed with the sticks? - Four-digit 63154
In entry 85 * 0, replace the asterisk with a number to give the smallest possible four-digit number divisible by 4. - 4 digit number
I am a four-digit number. My thousand period has a first digit which is thrice the second digit, and the second digit is two more than the third digit. All the rest of the digits are zeros. What number am I? - A test
A test has 20 questions. The test takes away 1 point if the answer is incorrect. A student answered eight questions incorrectly. How many points did the student lose? - The freshman
The freshman was held at the activity center with 12567 seats. If people did not occupy 120 sets, how many seats are occupied?
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