# Natural numbers + multiplication - math problems

#### Number of problems found: 90

• Three-digit How many three-digit natural numbers do not have the number 7?
• Big numbers How many natural numbers less than 10 to the sixth can be written in numbers: a) 9.8.7 b) 9.8.0
• Digits How many natural numbers greater than 4000 which are formed from the numbers 0,1,3,7,9 with the figures not repeated, B) How many will the number of natural numbers less than 4000 and the numbers can be repeated?
• Twenty-five How many three-digit natural numbers are divisible by 25?
• Three-digit How many three-digit natural numbers is greater than 321 if no digit in number repeated?
• Three-digit integers How many three-digit natural numbers exist that do not contain zero and are divisible by five?
• Count of roots How many solutions has equation x. y = 7757 with two unknowns on the set of natural numbers?
• Number 4 Kamila wrote all natural numbers from 1 to 400 inclusive. How many times did she write the number 4?
• Rectangles How many rectangles with area 8713 cm2 whose sides are natural numbers are?
• Dd 2-digit numbers Find all odd 2-digit natural numbers compiled from digits 1; 3; 4; 6; 8 if the digits are not repeated.
• Prime factors Factor the number 6600 into the product of prime numbers.
• Theorem prove We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
• A three-digit numbers Determine the total number of positive three-digit numbers that contain a digit 6.
• Telephone numbers How many 7-digit telephone numbers can we put together so that each number consists of different digits?
• Written number Place+values x ten thousands =30 thousands
• Progression -12, 60, -300,1500 need next 2 numbers of pattern
• Weeks 38 weeks is equal to how many days?
• Quotient Determine the quotient (q) and the remainder (r) from division numbers 100 and 8. Take the test of correctness.
• Expression If A=2 B=3 evaluate expression A(B+A) and multiply it by A
• Lcm 2 Create the smallest possible number that is divisible by numbers 5,8,9,4,3

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