Divisibility - practice problems - page 8 of 23
Number of problems found: 450
- Even number formula
Write a formula for an even number x if y denotes any odd number. - Beet harvest
Beet harvesting is underway in the field. The beets are transported to 3 different processing plants by 3 trucks. One truck manages to return to the field 3 times per hour, the second every 30 minutes, and the third has the shortest route, so it turns aro - Digit sum calculation
Calculate the digit sum of 1 345 901 - Consecutive number calculation The sum of two consecutive natural numbers, of which the greater is 4x, equals the number 55. Determine the number x.
- House number puzzle
Paul walks down the street on the side where the houses are numbered with even numbers. From the number 2, count the number of twos in the house numbers. He stops at home, in front of which he counts the fifteen two. What is the number of this house? - Five-digit divisibility Find the smallest five-digit number A432B that is divisible by 15.
- How many
How many numbers are less than 222 with a digit sum of 8? - Air draft The numbers 1,2,3,4,5 are written on five tickets on the table. Air draft randomly shuffled the tickets and composed a 5-digit number from them. What is the probability that he passed: and the largest possible number b, the smallest possible number c, a n
- Drawing from a hat
When drawing numbers from a hat from 1 to 35, we select randomly given numbers. What is the probability that the drawn numbers will be divisible by 8 and 2? - PIN code puzzle
My mother forgot the PIN code of her ATM card, which consisted of 4 different numbers. Help her put it together if she remembers: And - all the numbers were even B - zero in the pin code was not C - the first number was a multiple of the second number, wh - How many 4
How many four-digit numbers that are divisible by ten can be created from the numbers 3, 5, 7, 8, 9, and 0 such no digits repeats? - Number probability calculation
1. What is the probability that we write an even number from the numbers from 1 to 20? 2. We randomly draw one ticket From the eighteen tickets numbered 1 - 18. What is the probability that the ticket drawn will have: a) a number divisible by 3 c) a prime - Four-digit The number is four digits, even, and divisible by five. - The third digit is the highest prime number from 0 to 10. - The first digit is the quotient when any number is divided by itself. - The second digit is obtained by adding twice the first digit to t
- Square tile space
What is the smallest square space we can tile with tiles measuring 25 x 15 cm, knowing there will be no need to cut them? How many tiles will we use? - Even number creation How many even two-digit numbers can be created from the digits 2, 3, 4, and 5 if no digit may be repeated?
- The sum
The sum of five consecutive odd numbers is 75. Please find out the sum of the second and fourth of them. - Divisors of 560 Which of the numbers 5, 6, 7, 14, and 15 are divisors of 560? Please justify the answer.
- The missing digit Complete the missing digit in the number 3 ∗ 43 to form a number divisible by three. If there are multiple options, list them all. (The omitted digit is marked with the symbol ∗. ) Answers must be justified!
- Ratio
Alena collected 7.8 kg of blueberries, 2.6 kg of blackberries, and 3.9 kg of cranberries. Express the ratio in the smallest natural numbers in this order. - On Turtle Island
The weather on Turtle Island is unusual. It always rains on Mondays and Wednesdays, it is foggy on Saturdays, and the sun shines on all other days. A group of tourists want to come to the island for a 44-day holiday. What day should the holiday start so t
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