158 One possible sequence is t(n) = 0.5*(19n2 - 7n + 40) for n = 1, 2, 3, ...
51 is not a prime number: 3x17=51
51 is composite number
23 is the prime number.
51. Just add two to an odd number to work out the next ;)
31
9-2=7, 23-9=14, 51-23=28, 107-51=56. therefore, since the next number in the sequence will be twice the previous difference, it will be 107+112 which is 219
91
91
The rule is 5 10 15 20 25 30 .... etc and accordingly the next number in the sequence will be 106
the next prime number after 51 is 60 :)
158 One possible sequence is t(n) = 0.5*(19n2 - 7n + 40) for n = 1, 2, 3, ...
51
51 is not a prime number: 3x17=51
Start by adding 7, then add 7x2, then 7x4, then 7x8, etc. 2 + (7x1) = 9 9 + (7x2) = 23 23 + (7x4) = 51 51 + (7x8) = 107 The next number is 219.
51 is composite number
23 is the prime number.