Letter SequencePro Problems > Math > Number and Quantity > Number Theory > Patterns
Given the following sequence, what are the next two letters in the sequence?
D, H, L, P, S,...
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Predict the value of y in the following chart:
Given the following table of x and y values, find a pattern relating the two numbers, and then answer the question below.
If all x values are three digit numbers, what is the difference between the largest possible y and the smallest possible y?
Given the following sequence of compass directions, state the next two directions in the sequence and explain your answer.
North, East, West, South, South, …
A triangular number is a number which can be represented by a set of dots drawn in a triangular pattern. For example, ten is a triangular number because it can be displayed like this:
♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦
Thus, the first few triangular numbers are 1, 3, 6, 10, and 15. Find the 200th triangular number.