How do you determine the number of digits in a product?
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How do you determine the number of digits in a product?
Whether it is an M+N-1 or an M+N digit answer is determined by the numerical value of the multiplicands. As a proof , consider a 3-digit number and a 2-digit number. If both the numbers are greater than x 10^[no of digits in them(M and N)] then the product is guaranteed to be a M+N digit number.
Can you tell how many digits will be in a multiplication answer?
You can take log10 of each of the numbers being multipled, sum them, floor them, then add one to get the number of digits. i.e. In your last example of 2*12321*1000, which is actually equal to 24642000 (you missed a 0, so it has 8 digits).
What is the product of digits?
The product of two numbers is the result you get when you multiply them together. So 12 is the product of 3 and 4, 20 is the product of 4 and 5 and so on.
What is a 2 digit product?
The simplest case is when two numbers are not too far apart and their difference is even, for example, let one be 24 and the other 28. Find their average: (24 + 28)/2 = 26 and half the difference (28 – 24)/2 = 2.
How many digits are there in the product of 2 101 and 5 99?
We’ll have 99 zeroes+ 4 at the beggining, so 100 digits.
What is the number in the unit place in 729 59?
In other words, if 729 is multiplied an even number of times, the number in the unit place will be 1. Thus, the number in the unit place in (729)58 is 1. So, (729)59 = (728)58 X (729) = (……. 1) X(729) = 9 in the unit place.
What is the product of 28?
Positive pair factors of 28:
| Factors | Pair factors |
|---|---|
| 4 × 7 = 28 | (4, 7) |
| 7 × 4 = 28 | (7, 4) |
| 14 × 2 = 28 | (14, 2) |
| 28 × 1 = 28 | (28, 1) |
How many two digit numbers are there which are divisible by 5?
18 two-digit numbers
Hence 18 two-digit numbers are divisible by 5.
How many 5-digit numbers are there in all?
90,000 five
As the name says, a 5-digit number compulsorily has 5-digits in it. The smallest 5-digit number is 10,000 and the greatest 5-digit number is 99,999. There are 90,000 five-digit numbers in all.