Each number is 8 more than the preceding number.
The sequence interval is 2 4 6 8 ( this is the difference of number). so the missing number is -1 if I'm not mistaken.
37.
These are in groups of 4, each in the sequence n, n-2, n-3, 2(n-3). So the series continues after 25: 23, 22, 44. So the number after 25 is 23
23
24
23
The sequence interval is 2 4 6 8 ( this is the difference of number). so the missing number is -1 if I'm not mistaken.
The next number in the sequence would be 23. The sequence consists of prime numbers.
37.
The pattern is +5, +6, +7, so the next number will be 23 + 8 or 31.
These are in groups of 4, each in the sequence n, n-2, n-3, 2(n-3). So the series continues after 25: 23, 22, 44. So the number after 25 is 23
23
24
15
63
If you mean... -7+x*2=23 then x = 15. Done without the aid of a calculator ! The value of 'x' (the unknown number) MUST equal 30, because 30-7=23 - SO, half the unknown number must be 15!
107 double difference each time 2 + 7 = 9 9 + 7 + 7 = 23 23 + 14 + 14 = 51 51 + 28 + 28 = 107