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Maths Puzzle
Numerical Ability
In how many ways can you walk up a stairway that has 7 steps if you can take 1 0r 2 steps at a time?
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book Other Question
Find a counter-example to the statement 4^n+1 is divisible by 5.
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I need help finding the radius and center of a circle with the following equation x squared+ y squared + 4x + 10y + 15 = 0 thanks!