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How many two-digit primes are there whose units digit is less than its ten digits?
Wiki User
∙ 10y ago
There is no simple formula for that; I suggest you look up the prime numbers in a table of prime numbers, analyzing each prime number in the range 10-99 whether it fulfills this specific criterion.
Wiki User
∙ 10y ago
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If The tens digit is twice the units digits and the units digit is the same as the tenths digit the hundredths digit is half the tenths digit?
84.42 or 42.21
What is a unit's digit of the product?
It is the unit's digit of the product of the unit's digits. For example, the units digit of 123456 * 4689 is simply the units digit of 6*9 = 54, which is 4.
What is the units digit of the least whole number greater than 1000 whose digits are all different?
What is the units digit of the least whole number greater than 1000 whose digits are all different?
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 do you round 9876 to the nearest hundred?
Look at the tens digit. If it is 5 or more, add 100 to 9876. Then replace all the digits to the right of the hundreds digit (the tens and units digits) by zeros. The answer is therefore 9900
What is The tens digit is twice the units digits the units digit is the same as the tenths digit the hundredths digit is half the tenths digit?
42.21 or 84.42
If The tens digit is twice the units digits and the units digit is the same as the tenths digit the hundredths digit is half the tenths digit?
84.42 or 42.21
What is a unit's digit of the product?
It is the unit's digit of the product of the unit's digits. For example, the units digit of 123456 * 4689 is simply the units digit of 6*9 = 54, which is 4.
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.
What two digit number are interchanged to form a new two-digit number?
Any two digit number in which: (a) the units digit is not 0, and (b) the two digits are different will form a new 2-digit number when the digits are interchanged.
What is the units digit of the least whole number greater than 1000 whose digits are all different?
What is the units digit of the least whole number greater than 1000 whose digits are all different?
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.
Im a 2-digit number the sum of your digits is 6 my units digit is two times my tens digit what am i?
-4
What are the rules for divisibility rules for 4 and 9?
The last two digits (the tens and units) are divisible by 4.This is equivalent to the following two conditions:If the tens digit is even, the units digit must be 0, 4 or 8If the tens digit is odd, the units digit must be 2 or 6For divisibility by 9, calculate the digital root: this is the sum of all the digits in the number. Repeat with the digits of this number - and keep repeating until you are down to a single digit. It that is 9, then the number is divisible by 9 and if not, it is not.
What are the answers for junior maths challenge 2010?
I am a three digit number. all of my digit is multiples of 2. my hundreds digit is the lowest even number. the sum of my digits is 16. the units digit is the same as the difference between my hundreds and tens digits.
How many of the integers from 1 to 121 that have a units digit of 1 are prime?
The prime numbers with a units digit of 1 in the range 1 - 121 are :- 11, 31, 41, 61, 71 and 101.......making 6 primes in total.
What fraction of the primes between one and hundred have 3 as its units digit?
They are: 3 13 23 43 53 73 and 83 which as a fraction is 7/25 because there are 25 primes between one and a hundred
