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Earn +20 ptsQ: How many composite numbers up to 100 have 1 in their units digit?
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How many 3 digit numbers are there with 6 in the units place?
There are 90 of them.
How many numbers between 100 and 1000 have two as the units digit?
90 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.
Is 29 a two digit composite number?
no it is a prime number (prime means its multiples are only 1 and itself composite numbers can have multiples of many other things)
How many times does the digit 3 appear in the first 40 odd numbers?
Well, honey, the digit 3 appears in every odd number that ends in 3, 13, 23, 33, and so on up to 39. So, in the first 40 odd numbers, the digit 3 appears 4 times. Math doesn't have to be a drag, darling!
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