It is Un = 2^(n-1) + 1 for n = 1, 2, 3, ...
17
There must be 67 marbles.
You seem to be asking what consecutive numbers are. Consecutive numbers are integers in order, with each one being exactly 1 higher than the previous one. To put it another way, each number is the next higher integer after the previous one. For example, 3, 4, 5, 6, 7 are consecutive numbers. One can also refer to consecutive even numbers, consecutive odd numbers, consecutive square numbers, etc. In each case, each number in the sequence is the next higher number of the specified kind after the previous one. For example, 12, 14, 16, 18 are consecutive even numbers.
18
the answer is 4
You multiply the previous number by consecutive numbers starting with 1.
17
36
Oh honey, let me break it down for you. If the first line starts with 10 marbles, and each consecutive line has one less marble than the previous line, by the time you get to the seventh line, you'll have 4 marbles. So, grab those 4 marbles and go win that game, darling!
There must be 67 marbles.
Consecutive integers are integers that follow in sequence. Each number is 1 more than the previous numbers.
You seem to be asking what consecutive numbers are. Consecutive numbers are integers in order, with each one being exactly 1 higher than the previous one. To put it another way, each number is the next higher integer after the previous one. For example, 3, 4, 5, 6, 7 are consecutive numbers. One can also refer to consecutive even numbers, consecutive odd numbers, consecutive square numbers, etc. In each case, each number in the sequence is the next higher number of the specified kind after the previous one. For example, 12, 14, 16, 18 are consecutive even numbers.
1
10
22 marbles are in the fifth line.
18
the answer is 4