Two brothers belong to a club with 10 members. Four are selected for a match. Find the probability that both brothers are selected.
The equation a^x + b^x = 1 can be solved algebraically in special cases but in general it can only be solved by numerical methods.
Can you find the area of the central part of this shape? Can you do it in more than one way?
Which is the bigger, 9^10 or 10^9 ? Which is the bigger, 99^100 or 100^99 ?
See how the motion of the simple pendulum is not-so-simple after all.
Things are roughened up and friction is now added to the approximate simple pendulum
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