Ten of them.
There are five of them, including the number 1.
1and 11564
1, 4, 9, 16, 25, 36
There are exactly 5,761,455 prime numbers below 100,000,000, the first being two, and the last 99,999,989.
1.999 and 1.9999
all multiples of 9 i.e 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99
Ten of them.
There are 57 such numbers.
There are five of them, including the number 1.
Because the prime numbers between 1and 50 only have exactly 2 unique factors.
The prime numbers: 2, 3, 5, 7, 11, 13, 17 and 19.
3,628,800
1and 11564
The even numbers between 1 and 13 are 2, 4, 6, 8, 10, and 12.
The numbers are 11 and 10
write an algo to find the sum of even number from 1to n