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What are adjacent number in a clock whose sum is triangle number?
Wiki User
∙ 11y ago
{1, 2}, {7, 8} and {10, 11}.
The triangular numbers are 1, 3, 6, 10, 15, 21, 28, ...
The sum of two adjacent numbers is odd, so adjacent numbers that sum to 1, 3, 15, 21 are the solution.
1 is impossible, leaving 3, 15 & 21 as possible sums, giving the adjacent numbers {1, 2}, {7, 8} & {10, 11}
Wiki User
∙ 11y ago
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What do you do in trigonometry when you are only given the opposite and adjacent sides?
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