The image presents two number sequences, labeled (i) and (ii). We need to identify the pattern in each sequence and find the next numbers. Sequence (i): 7, 14, 21, 28, ... Sequence (ii): 1, 3, 7, 15, 31, ...

ArithmeticSequencesArithmetic ProgressionNumber Patterns
2025/4/15

1. Problem Description

The image presents two number sequences, labeled (i) and (ii). We need to identify the pattern in each sequence and find the next numbers.
Sequence (i): 7, 14, 21, 28, ...
Sequence (ii): 1, 3, 7, 15, 31, ...

2. Solution Steps

Sequence (i): This is an arithmetic progression.
The difference between consecutive terms is:
147=714 - 7 = 7
2114=721 - 14 = 7
2821=728 - 21 = 7
So the common difference is

7. The next term is obtained by adding 7 to the last term.

28+7=3528 + 7 = 35
Sequence (ii):
Let's analyze the differences between consecutive terms:
31=23 - 1 = 2
73=47 - 3 = 4
157=815 - 7 = 8
3115=1631 - 15 = 16
The differences are 2, 4, 8, 16, which are powers of 2 (2^1, 2^2, 2^3, 2^4). The next difference should be 25=322^5 = 32.
So the next term in the sequence is:
31+32=6331 + 32 = 63

3. Final Answer

Sequence (i): The next number is
3

5. Sequence (ii): The next number is 63.

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