Seems like each number is obtained by adding 3 to the previous number. Hence the next three numbers are 13, 16, 19
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Looks like an arithmetic progression of (-3). 10-3=7; 7-3=4; 4-3=1; 1-3=-2
They are: 0, -5, -10
10 the sequence is 3 numbers miss one, three numbers miss one, etc
To work out Pascal's Triangle, you start with two ones at the top. From there on, you add the two numbers above to get the next number. The numbers on the outside will always be 1. ....1.....1 ...1...2...1 ..1..3...3..1 .1.4...6...4.1 1 5 10 10 5 1
The prime numbers between 1 and 10 are 1, 3, 5, and 7.