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How many two digit prime numbers are there between 1-100 such that they have digit 7 in their units place?
There are 5 of them.
How many 4 digit numbers can be formed using 0 1 2 3 5 7 how many contain 2 in units place?
Without repetition, 300. Of these 48 will have a 2 in the units place.
How many times does the digit 1 occur in tens place in the numbers from 100 to 1000?
That looks like it should be the same as 10 times (the number of times the digit 1 occursin the units place in the numbers from 10 to 100), which would work out to 90 .
How many numbers between 100 and 1000 have two as the units digit?
90 of them.
How many composite numbers up to 100 have 1 in their units digit?
There are four of them.
How many two digit prime numbers are there between 1-100 such that they have digit 7 in their units place?
There are 5 of them.
How many 4 digit numbers can be formed using 0 1 2 3 5 7 how many contain 2 in units place?
Without repetition, 300. Of these 48 will have a 2 in the units place.
How many two digit prime numbers have a units digit of 7 and what are the prime numbers?
17, 37, 47, 67, 97
How many times does the digit 1 occur in tens place in the numbers from 100 to 1000?
That looks like it should be the same as 10 times (the number of times the digit 1 occursin the units place in the numbers from 10 to 100), which would work out to 90 .
How many numbers between 100 and 1000 have two as the units digit?
90 of them.
How many composite numbers up to 100 have 1 in their units digit?
There are four of them.
How many times does the digit 1 occur in ten place in the numbers from 1 to 1000?
How many times does the digit 1 occur in ten place in the numbers from 1 to 1000?
How many three digit numbers are there with zero at tens place?
there are no 3 digit tis two digit! :) * * * * * 90 of them.
How many times will the 5 digit be used in numbering the pages of a 145-page book?
Assume that the pages are numbered 1-145 in order and we don't have any other page numbering system.In every ten pages the digit 5 will appear in the units column once,e.g. 5, 15, 25, 35, 45 etc.That makes 15 fives.In the 50's the digit 5 will also appear in the tens columne.g. 50,51,52,53,54,55,56,57,58,59That makes another 10 fives.Don't worry about page 55, remember we counted the unit's digit 5 first then the ten's digit 5.The book is too short to have digit 5 in the hundreds column.So the digit 5 appears 25 times in the numbering of a 145-page book. == Answer== From 1 to 145, we have 9 one-digit numbers and 100 two-digit numbers and 46 three-digit numbersIn one-digit numbers we have only one chance to have 5.In two-digit numbers we can have 5 in the units place, in the tens place or the both.If we have 5 in the units place, then we can fill up the tens place by the numbers from 1 to 9. So, we get 9 chances.If we have 5 in the hundreds place, then we can fill up the units place by the numbers from 0 to 9. So, we get 10 chances.In three digit numbers, we can’t have 5 in hundreds place and tens place because we have 145 pages in all. So, we can have 5 in units-place only.The hundreds place cannot be filled with any other number except 1.So, we can fill the tens place by the numbers from 0 to 4 only. So, we get 5 chances.In total, 25 times we come across 5. Source: www.icoachmath.com
How many times does the digit 7 go into 87?
Once, in the units' place.
How many three digit numbers are there with zero at one place?
90 of them.
How many 10 digit numbers are there with a 6 in the 100s place?
There are 900,000,000 of them.
