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What is the gcf of all composite numbers under 100?
The GCF of all the composite numbers under 100 is 1. For e.g 4 & 9 are composite numbers & their GCF is 1, so if we take other composite numbers along with 4 & 9 the GCF will be 1.
Which numbers between 1 and 100 have an odd number of factors?
1, 4, 9, 16, 25, 36, 49, 64, 81, 100
How many 3 digit counting numbers are not multiples of 5?
There are 720 of them. The three digit counting numbers are 100-999. All multiples of 5 have their last digit as 0 or 5. There are 9 possible numbers {1-9} for the first digit, There are 10 possible numbers {0-9} for each of the first digits, There are 8 possible numbers {1-4, 6-9} for each of the first two digits, Making 9 x 10 x 8 = 720 possible 3 digit counting numbers not multiples of 5.
Spatial patterns for numbers to 9?
numbers 1-9 is the answer
List all numbers between 1 and 100 with 3 factors?
Prime squares: 4, 9, 25 and 49
How many 9's are there in the numbers from 1-100?
20
How many numbers between 1 and 100 are divisible by 9?
11 (9, 18, 27, 36, 45, 54, 63, 72, 81, 90 and 99) Those numbers divisible by 9 are the multiple of 9; thus need to know how many multiples of 9 there are between 1 and 100: 100 ÷ 9 = 11 r 1 ÷ last multiple of 9 is 11 × 9 (= 99) → There are 11 - 1 + 1 = 11 numbers between 1 and 100 which are divisible by 9. (They are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.)
How many 9's are there in 1too100?
Just the one which is 9 but there are 20 numbers from 1 to 100 that contain the digt 9
How many times does the digit 9 appear in the numbers from 1 to 100?
11 times
How many numbers between 1 and 100 inclusive are divisible by 9 or 4?
34 of them.
How many numbers between 1 and 100 inclusive are divisible by 10 or 9?
Twenty of them.
How many not square numbers less than 100?
There are nine square numbers including 1 below 100 (1x1...9x9). So, there are 99 - 9 'not square numbers' below 100 which is 90
How many whole numbers between 100 and 999 equal the sum of 9?
45 of them.
How many keystrokes are needed to type numbers from 1 to 100?
1*9+2*90+3*1=192
Which is prime numbers and composite numbers between 1 to 100?
9
How many whole numbers between 1 and 100 use the digits 9 at least once?
Twenty of them from 9 to 99
How many digits are required to write numbers between 1 and 100?
1 to 9 = 9 10 to 99 = 9o x 2 = 180 100 = 3 9 + 180 + 3 = 192
