Divisibility - practice problems - page 4 of 21
Number of problems found: 406
- Hens and pigs
Hens and pigs have 46 feet in total. At least how much can heads have? - Digit sum
How many are three-digit numbers that have a digit sum of 6? - Decomposition
Make decomposition using prime numbers of number 155. The result write as prime factors (all, even multiple) - Divisible 80468
The numbers 100, 300, 700, 900, 1500, and 7000 are divisible by four. Why are numbers ending in 00 divisible by four? - Divisible 73494
What digit should X replace so that the number 6X94 is divisible by nine? - Expression 66754
Find the largest natural number n for which the value of the expression (37-2n) / 3 equals the natural number. - Divisors 6619
Which natural number less than 100 has the largest number of divisors? - Numbers 2788
How many numbers from 0 to 999 contain at least one digit, 5? - Divisible by nine
How many three-digit natural numbers in total are divisible without a remainder by the number 9? - Four-digit number
Find a four-digit number, which quadrupled written backward is the same number. - Number 80500
Which number does not belong in the number series and why? 11. . . 13 . . . 15 . . . 17 . . . 19 - Four-digit 63154
In entry 85 * 0, replace the asterisk with a number to give the smallest possible four-digit number divisible by 4. - Difference 56811
I think the number. The difference between nine times and four times the unknown number is 625. What number do I think? - Three-digit 56441
Determine the number of all-natural three-digit numbers divisible by 9, consisting of the numbers 0, 1, 2, 5, 7: - Consecutive 47011
The sum of two consecutive odd numbers is 184. What are these numbers? - 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 30481
Find the smallest five-digit number A432B that is divisible by 15. - Difference 4779
What is the difference between the largest and smallest numbers, composed of only odd digits and none of the digits repeated in the numbers? - Prime divisors
Find 2/3 of the sum's ratio and the product of all prime divisors of the number 120. - Probability
How probable is a randomly selected three-digit number divisible by five or seven?
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