Number Sequences

What is the next number?

100

5, 10, 15 ...

20

200

12, 18, 24 ...

30

300

-7, -14, -21 ...

-28

400

1, 10, 100 ...

1000

500

2, 4, 8 ...

16

What is the rule?

100

9, 16, 23 ...

Add 7

200

5, 50, 500 ...

multiply by 10

300

4, ?, 10, 13 ...

add 3

400

-2, 0, 2, 4 ...

Add 2

500

48, 24, 12, 6, 3 ...

Divide by 2

What is the first number?

100

? , 5, 10, 15 ...

0

200

? , 45, 50, 55, 60 ...

40

300

? , 10, 100, 1000 ...

1

400

? , 21, 28, 35, 42 ...

14

500

? , 4, 8, 16 ...

2

What is the missing number?

100

10, 20, ? , 40, 50 ...

30

200

3, 6, ?, 12, 15 ...

9

300

100, 99, ? , 97 ...

98

400

2, 20, ? , 2000 ...

200

500

100, ? , 25, 12.5 ...

50

What are the next 3 numbers?

100

5, 4, 3 ...

2, 1 and 0

200

10, 12, 14 ...

16, 18 and 20

300

2, 4, 8 ...

16, 32 and 64

400

2048, 1024, 512, 256, 128, 64, 32, 16 ...

8, 4 and 2

500

Start with 1 and multiply by 1000

1000 (one thousand) then 1000,000 (one million) then 1,000,000,000 (one billion)