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What is the probability that a random 2 digit number ia a multiple of 7?
There are (99 - 9) = 90 2-digit numbers.13 of them are multiples of 7.The probability is 13/90 = 14.4% (rounded)
What are 2-digit multiples of 5?
-3
What is the probability that the sum of two different single-digit prime numbers will NOT be prime?
1/2
What is the probability that a 2 digit number is odd?
The probability is 1/2.
What is the probability that a 2 digit number is even?
The probability is 1/2.
Is anyone of the numbers 0123 place value?
No. A number with multiple digits does not have a place value. A single digit in a multi-digit number has a place value.
How can you tell that 189 is divisible by 3 without doing the division?
Add up the digits in a number, and if that sum is a multiple of 3, then the original number is also a multiple of 3. So 1 + 8 + 9 = 18, which if you're still not sure then 1+8=9, which is a multiple of 3. You can repetitively sum the digits until you have a result of a single digit number. If the single digit result is 3,6 or 9, then the original number is a multiple of 3. Also, if the single digit number is 9, then the number is also a multiple of 9. However, if the result is 6, then it is not necessarily a multiple of six.
Is 19 a multiple of 3?
No. To check if a number is a multiple of 3 add its digits together and if this sum is a multiple of 3, then so is the original number. This sum can be continued until a single digit remains; if the single digit is 3, 6 or 9 then the original number is a multiple of 3, otherwise not. 19 → 1 + 9 = 10 10 → 1 + 0 = 1 which is not 3, 6 or 9, so 19 is not a multiple of 3.
What is the probability that a 3-digit number has an even digit in the hundreds place?
It is 4/9
What is the theoretical probability of the ones digit number is greater than the tens digit?
It is 0.45
What is a 2-digit multiple of 12 and multiple of 10?
The only positive two-digit multiple of 12 and 10 is 60.
What is the probability of guessing a 4 digit code with numbers 1 to 5?
The probability is 1 over 20.
