0
How many numbers from 100 to 999 inclusive have one digit which is the average of the other two?
45, of which 9 are of the form nnn.
The options are (a) 121 (b)117 (c) 112 (d) 115 (e) 105.
It's out of those answers. If you're like me and retrieved this question off the Australian Maths Competition than you probably already know the options. Surprisingly this question stumped me. However I will try and work it out.
What else can I help you with?
What are the four digit numbers you can make out of 0-9?
9
How is multiplying by multi-digit numbers similar to multiplying by two-digit numbers?
Multiplying by multi-digit numbers is similar to multiplying by two-digit numbers in that both processes involve breaking down the numbers into place values and multiplying each digit by each digit in the other number. The key similarity lies in the application of the distributive property, where each digit in one number is multiplied by each digit in the other number, and then the products are added together to get the final result. This process is consistent whether you are multiplying by a two-digit number or a multi-digit number.
What is the square root of all the square numbers between 1 and 300?
There are 16 square numbers between 1 and 300: 2 to 17 inclusive. There is no square root of these numbers: only of their sum or product or average or some other operation.
How many different numbers between 250 and 400 have '2' as the tens digit?
That would be the numbers in the form "32x" (where "x" can be any digit). In other words, ten numbers.
Do all composite numbers end in 2?
No, there are composite numbers that end in every other digit.
What are the four digit numbers you can make out of 0-9?
9
How to do 3 digit division?
Yes. By 1 digit, 2 digit and some even by other 3 digit numbers.
How is multiplying by multi-digit numbers similar to multiplying by two-digit numbers?
Multiplying by multi-digit numbers is similar to multiplying by two-digit numbers in that both processes involve breaking down the numbers into place values and multiplying each digit by each digit in the other number. The key similarity lies in the application of the distributive property, where each digit in one number is multiplied by each digit in the other number, and then the products are added together to get the final result. This process is consistent whether you are multiplying by a two-digit number or a multi-digit number.
What is the square root of all the square numbers between 1 and 300?
There are 16 square numbers between 1 and 300: 2 to 17 inclusive. There is no square root of these numbers: only of their sum or product or average or some other operation.
How many different numbers between 250 and 400 have '2' as the tens digit?
That would be the numbers in the form "32x" (where "x" can be any digit). In other words, ten numbers.
How many 2 digit numbers have one digit that is twice the other?
Eight (8) of them do.They are1221243642486384 .
Do all composite numbers end in 2?
No, there are composite numbers that end in every other digit.
How many 7 digit telephone numbers can be formed the first digit cannot be zero?
9,000,000 if there are no other requirements.
How can you divide two four digit numbers by each other?
Yes.
Composite numbers up to100 have 1 as their unit's digit?
Composite numbers are integers greater than 1 that can be divided evenly by numbers other than 1 and themselves. In the case of numbers up to 100, the unit's digit refers to the digit in the ones place. The claim that composite numbers up to 100 have 1 as their unit's digit is incorrect, as composite numbers can have any digit in the ones place depending on their factors.
How many three-digit counting numbers are not multiples of 2?
The 3-digit counting numbers are 100 through 999 = 900 numbers.Half them are multiples of 2 (even numbers).The other half are not . . . 450 of them.
The average of six numbers is 4 If the average of two of those numbers is 2 what is the average of the other four numbers?
5
