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- 90A natural number multiplied by some integer results in a number with only ones and zeros
- 72Striking applications of integration by parts
- 58Why rationalize the denominator?
- 51Is value of $\pi = 4$?
- 44Can $x^3+3x^2+1=0$ be solved using high school methods?
- 36Is 1 divided by 3 equal to 0.333...?
- 36prove that $10200300040000100004000300201$ is not perfect square
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