# Natural numbers + prime numbers - practice problems

#### Number of problems found: 164

- Mr. Product

The product of the ages of all of Mr. Product children's is 1408. The age of the youngest child is equal to half the age of the oldest child. How many children does Mr. Product have and how old are they? - The GCF

The GCF of 40 and a number is 8. what is the number if it lies between 70 and 80? - Lcm and hcf

If the LCM of a and 18 is 36 and the HCF of a and 18 is 2, then a = … - AND-NOT-AND

If P is the set of multiples of 2, Q is the set of multiples of 3, and R is the set of multiples of 7, which of the following integers will be in P and Q but not in R? A=−54 B=−50 C=42 D=100 E=252 - Rey collected

Rey collected three glasses of color marbles the first glass has 27 red marbles the second has 36 green marbles and the third has 54 blue marbles he placed the marbles into a set of boxes of each kind . what is the greatest number of marbles that he can p - Marie-Pier

Marie-Pier, Frédéric and Simon bump into each other in the street on a Tuesday while the three of them are running. Marie-Pier trains every 3 days, Frédéric every 4 days and Simon every Tuesday. If they all keep up with their training pace, in how many da - Check divisibility

Put a check under each column to identify whether each number is divisible by 2, 5, 10, 3, 6 or 9. @TB@ 54180#1 624 2700 5605 568 @TE@ - Lcm = 22 + gcd

The least common multiple of two numbers is 22 more than their greatest common divisor. Find these numbers. - Most divisors

From the natural numbers from 1 to 100, find the one that has the most divisors. - Athletics team

All athletes in the athletics team from Ostrava can start in four, five, six and seven stages, and no one will be present. How many average athletes are in one athletic group if there are a total of twelve groups in the section? Consider the smallest numb - Simplest form 3

What fraction is 15 of 35 in simplest form? - The sum 13

The sum of the exponents of the prime factors in the prime factorization of 196 is. .. . - A number 5

A number is divisible by 24, 25, and 120 if it is increased by 20. Find the number. - What fraction

What fraction of number 1 to 30 is prime? - The drama club

The drama club meets in the auditorium every 6 days and the choir meets there every 5 days. If the groups are both meeting in the auditorium today, then how many days from now will they next have to share the auditorium? - Mangoes

Chris has 12 mangoes and Jay has 18 mangoes. Each of them will share the mangoes to their friends . What's the greatest number of mangoes each of their friends get if Chris and Jay will give the same number of mangoes? - 6/24 change

6/24 change to a fraction in lowest terms - Part-time workers

On Saturday, 210 part-time workers arrived in the village. One hundred five part-time workers worked on the first field, 60 on the second. The other part-time workers worked in the third field. They all worked in equal groups. How many workers worked in e - A rope

A rope can be cut into equal length with no rope left over. The lengths can be 15cm,18cm or 25cm. What is the shortest possible length of the rope? - Two-digit number

In a two-digit number, the number of tens is three greater than the number of units. If we multiply the original number by a number written in the same digits but in reverse order, we get product 3 478. Find the original number.

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Natural numbers - practice problems. Prime numbers - practice problems.