Divisibility + reason - practice problems
Number of problems found: 159
- What is 20
What is the least number that should be added to 2497 so that the sum of the digits is divisible by 5,6,10 - Three-digit 69114 How many three-digit numbers have a digit sum of 6? Write the ratio of the number of created even and odd numbers and adjust it to the basic form.
- Two-digit 68654 List all compound positive two-digit numbers whose greatest common divisor with the number 51 is the number 17.
- Divisible 68644 List all divisible numbers by six and seven and are greater than 79 and less than 91.
- Three-digit 66854
How many three-digit numbers with a digit sum of 9, in which no digit can repeat? - Expression 66754 Find the largest natural number n for which the value of the expression (37-2n) / 3 is equal to the natural number.
- Find two digits Find the possible values of A and B if the 6 digit number 2A16B6 is divisible by 4 and 9. Result write as composed number.
- How many How many double-digit numbers divided by nine give the rest of the seven?
- Even five-digit
How many even five-digit natural numbers with different digits can be created from the digits 0 - 6? - Dividing
One always remained when dividing the tangerines into packages of 8 or 10. How many were there if more than 250 and less than 300? - Three-digit 56441
Determine the number of all natural three-digit numbers divisible by 9, consisting of the numbers 0, 1, 2, 5, 7: - Lcm = 22 + gcd
The least common multiple of two numbers is 22 more than their greatest common divisor. Find these numbers. - Directly 55591
If n is a natural number that gives a division of 2 or 3 when divided by 5, then n gives a residue of 4 when divided by 5. Prove directly - Four-digit 55481
Find all four-digit abcd numbers to which: abcd = 20. ab + 16. cd, where ab and cd are double digits numbers from digits a, b, c, and d. - Consecutive 47011
The sum of two consecutive odd numbers is 184. What are these numbers? - We roll
We roll two dice A. - what is the probability that the sum of the falling numbers is at most 4 B. - is at least 10 C. - is divisible by 5? - Probability 42081 What is the probability of any two-digit natural number a) is divisible by seven, b) is divisible by nine, c) is not divisible by five.
- Five-digit number
Anna thinks of a five-digit number that is not divisible by three or four. If he increments each digit by one, it gets a five-digit number that is divisible by three. If he reduces each digit by one, he gets a five-digit number divisible by four. If it sw - Together
The three friends divided the balls in a ratio of 6: 5: 4. Some two of them got a total of 126 balls. How many balls were there together? - Coloured numbers
Mussel wrote four different natural numbers with coloured markers: red, blue, green and yellow. When the red number divides by blue, it gets the green number as an incomplete proportion, and yellow represents the remainder after this division. When it div
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