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21, 51, 81, 91.
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How many composite numbers up to 100 have 1 in their units digit?
There are four of them.
What are the composite numbers less than 100 whose units digit is 3?
33, 63 and 93
What is the ones digit of the following product 159 445 7762 39?
The units digit of 159*445*7762*39 is the units digit of the product of the units digits of the four numbers, that is, the units digit of 9*5*2*9 Since there is a 5 and a 2 in that, the units digit is 0.
How many 3 digit numbers are there with 6 in the units place?
There are 90 of them.
How many two digit prime numbers are there between 1-100 such that they have digit 7 in their units place?
There are 5 of them.
How many composite numbers up to 100 have 1 in their units digit?
There are four of them.
What is the digit in the units place of a number is 5 if the no lies between 150 and 200 will be composite or prime?
For any integer greater than 5, where the units digit is 5 then that number can be expressed as the product of n and 5. As such, the number is composite. Therefore all numbers in the range 150 to 200 that have a units digit of 5 are composite,.
What are the composite numbers less than 100 whose units digit is 3?
33, 63 and 93
Is 858 prime or composite?
The units digit of 858 is 8, which is even. Therefore 858 is even, i.e., divisible by 2. Therefore it is composite.
What is the ones digit of the following product 159 445 7762 39?
The units digit of 159*445*7762*39 is the units digit of the product of the units digits of the four numbers, that is, the units digit of 9*5*2*9 Since there is a 5 and a 2 in that, the units digit is 0.
How many two digit prime numbers have a units digit of 7 and what are the prime numbers?
17, 37, 47, 67, 97
The units digit of a two digit number exceeds twice the tens digit by 1 what numbers if the sum of its digit is 10?
The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.
How many 3 digit numbers are there with 6 in the units place?
There are 90 of them.
How many two digit prime numbers are there between 1-100 such that they have digit 7 in their units place?
There are 5 of them.
How many numbers between 100 and 1000 have two as the units digit?
90 of them.
How many 2-digit integers greater than 50 have the property that the sum of the digits is more than double the units digit?
When the units digit equals the tens digit then the sum of the digits of a 2 digit number is double the units digit. In each tens range above 50, numbers below this critical point meet the requirement, numbers above this critical point have a sum LESS than double the units digit. The applicable numbers are 51-54 (4), 61-65 (5), 71-76 (6), 81-87 (7) and 91-98 (8). Then there are 4 + 5 + 6 + 7 + 8 = 30 qualifying numbers.
The tens digit is two less than hundreds digit and four more than the units digit?
The number can be any one of these four numbers:640751862973
