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Earn +20 ptsQ: How many prime numbers up to 100 have 9 as their unit's digit?
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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 two digit prime numbers are there?
There are 21 two-digit prime numbers.
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.
How many three digit numbers have odd prime number as 1st digit A prime number as 2nd digit and an odd number as 3rd digit?
There are 17 such numbers.
How many prime numbers up to 100 have the number 9 as their units digit?
19 29 59 79 89 Five of them.
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