Natural numbers - 5th grade (10y) - math problems
Number of problems found: 73
- Sum of the digits
How many are two-digit natural numbers that have the sum of the digits 9?
- Primes 2
Which prime numbers is number 2025 divisible?
- The number 3
Ski organizers should print the start numbers from 1 to 45. How many times will they use the number 3 when printing?
- House numbering
The residential house has three entrances numbered even numbers, successive immediately behind. The sum of the two numbers on the outside entrances is 68. Calculate the middle of these three numbers.
Fill in the examples correctly brackets: A) 7.9+12:3-2 =23 B) 7.9+12:3-2=75
- What is missing (1000)
What number is to add to get 1000?
How many odd four-digit numbers can we create from digits: 0, 3,5,6,7?
If A=2 B=3 evaluate expression A(B+A) and multiply it by A
Write the smallest and largest 2-digit number.
Determine the quotient (q) and the remainder (r) from division numbers 100 and 8. Take the test of correctness.
- Roman numerals
Write numbers written in Roman numerals as decimal.
38 weeks is equal to how many days?
May be the sum of two integers less than their difference?
- I think
I think a number. When I multiply it by five, and after that I subtract 477, I get the same number as if I multiplied it twice. What number do I think?
Which number in division 16 give 12 and the rest 3?
Mom said that Suzan saves about 120 EUR (rounded to tens). How many euros could she at least save (minimum)?
123456789 = 100 Use only three plus or minus characters to correct previous identity/equation.
- Written number
Place+values x ten thousands =30 thousands
- Seven times
Which number seven times is just as higher as 27, how much is smaller than 29?
One of the summands is 145. The second is 10 more. Determine the sum of the summands.