You should know the following important sequences.

**Counting numbers**

1, 2, 3, 4, 5, 6, 7, 8.......

**Multiples of 2**

2, 4, 6, 8, 10, 12, 14, 16......

**Powers of 2**

2, 4, 8, 16, 32, 64, 128, 256......

**Powers of 10**

10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000......

**Fibonacci**

1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89......

**Square numbers**

1, 4, 9, 16, 25, 36, 49, 64......

**Cube numbers**

1, 8, 27, 64, 125, 216, 343, 512......

**Triangle numbers**

1, 3, 6, 10, 15, 21, 28, 36, 45......