Prime numbers - practice for 11 year olds - page 2 of 11
Number of problems found: 220
- Divisible by nine
How many three-digit natural numbers in total are divisible without a remainder by the number 9? - Counting number
What is the smallest counting number divisible by 2,5,7,8 and 15? - Number 80500
Which number does not belong in the number series and why? 11. . . 13 . . . 15 . . . 17 . . . 19 - Three-fifths 34771
Calculate three-fifths of the ratio of the product and the sum of all prime divisors of 240. - Identical 2781
What is the smallest number of nuts we can divide into 24 and 36 identical piles? - The smallest number
What is the smallest number that can be divided by both 5 and 7 - Two-digit number
I am a two-digit number less than 20. When I divide by three, you get the rest 1. When you divide me by four, you also get the rest 1. What number am I? - Determine 2757
The sum of all divisors of a certain odd number is 78. Determine the sum of all divisors of twice this unknown number. What is an unknown number? - Lcm and hcf
If the LCM of a and 18 is 36 and the HCF of a and 18 is 2, then a = … - Count of roots
How many solutions have equation x. y = 7757 with two unknowns on the set of natural numbers? - Number
What number should be placed instead of the asterisk in the number 702*8 to get a number divisible by 6? - Prime factors
Write 98 as a product of prime factors. - LCM
The common multiple of the three numbers is 3276. One number is in this number 63 times, the second 7 times, and the third nine times. What are the numbers? - The GCF
The GCF of 40 and a number is 8. what is the number if it lies between 70 and 80? - LCD 2
The least common denominator of 2/5, 1/2, and 3/4 - Decompose
Decompose into primes and find the smallest common multiple n of (16,20) and the largest common divisor D of the pair of numbers (140,100) - Bicycle wheels
The driving wheel of a bicycle has 54 teeth. The driven wheel has 22 teeth. After how many revolutions will meet the same teeth? - Determines 80517
Determines all two-digit numbers that have a greatest common divisor of 19 with the number 76 - Dance ensemble
The dance ensemble took the stage in pairs. During dancing, the dancers gradually formed groups of four, six, and nine. How many dancers have an ensemble? - Apples 2
How many minimum apples are in the cart? If possible, is it completely divided into packages of 6, 14, and 21 apples?
Do you have homework that you need help solving? Ask a question, and we will try to solve it.