Answer:
1. 2, 5, 7, 12, <u>19, 32, 51
</u>
2. 9, 11, 20, 31, <u>51, 82, 133
</u>
3. 2, 5, 10, 50<u>, 500, 25000, 12500000</u>
<u />
4. 1, 3, 3, 9, <u>27, 243, 6561</u>
Step-by-step explanation:
In the first one, we are adding
2 + 5 = 7
5 + 7 = 12
7 + 12 = <u>19</u>
19 + 32 = <u>51</u>
So we're taking the second number and the answer each time we add.
The second one, we add just like the first one
9 + 11 = 20
11 + 20 = 31
20 + 31 = 51
31 + 51 = 82
51 + 82 = 133
The third one however, uses multiplication
2 * 5 = 10
5 * 10 = 50
10 * 50 = 500
50 * 500 = 25000
25000 * 500 = 12500000
Now, try to figure out number four.
Hint: It uses multiplication
Hope I helped you!!!