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.
There are 800 such numbers.
There are 5 of them.
There are 10 one digit positive integers (0 - 9) and 9 one digit negative integers (-9 to -1) making 19 in all.
-23
19 29 59 79 89 Five of them.
17, 37, 47, 67, 97
There are 800 such numbers.
There are 5 of them.
There are 10 one digit positive integers (0 - 9) and 9 one digit negative integers (-9 to -1) making 19 in all.
-23
There are one thousand. Starting at 2000 and going to 2999
90
19 29 59 79 89 Five of them.
4
There are 21 two-digit prime numbers.
the answer would be 900
500