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The number of brothers Anna has is twice the number of sisters Anna has. The number of sisters Anna has is twice the number of brothers Anna has. Does Anna have any siblings?  No, Anna doesn't have any siblings. This is a clever riddle that plays with words. If Anna had brothers or sisters, one of the two statements would be true, but not both at the same time. For example, if Anna had two brothers and one sister, then the first statement would be true, but the second would not. Similarly, if Anna had one brother and two sisters, the second statement would be true, but not the first. Since both statements are given to be true, it leads to a contradiction, and therefore, the only logical conclusion is that Anna has neither brothers nor sisters, i.e., no siblings. 
What does the following represent: $\int_{\infty}^\infty e^{x^2} \,dx = \sqrt{\pi}$  The expression $\int_{\infty}^\infty e^{x^2} \,dx = \sqrt{\pi}$ represents a famous integral in mathematics, known as the Gaussian integral or the probability integral. Here's what each part of the equation means:
In probability theory, this integral is significant because it is the integral of the probability density function of a standard normal distribution, which is widely used to model random variables in many natural and social phenomena. The value of $\sqrt{\pi}$ represents the total area under the Gaussian curve, indicating that the probability of a random variable following a standard normal distribution taking on any value between negative infinity and positive infinity is exactly $\sqrt{\pi}$. In summary, the equation $\int_{\infty}^\infty e^{x^2} \,dx = \sqrt{\pi}$ represents the calculation of the area under the Gaussian curve, and the result is a fundamental constant with important applications in mathematics and its related fields. 
Box 1 contains the book. Box 2 contains the apple. Box 4 contains the brain. Move the book into Box 2. Put the bell into Box 4. Move the bell and the brain into Box 5. Box 2 contains:  Box 2 now contains the apple and the book. 
A man and his mother are in a car accident. The mother sadly dies. The man is rushed to the ER. When the doctor sees him, he says, "I can't operate on this man. He's my son!" How is this possible?  The doctor is the man's father. 
Without executing code, tell me what this says: TXkgcmVzZWFyY2ggaW52ZXN0aWdhdGVzIHRoZSBmdXR1cmUgb2Yga25vd2xlZGdlIHJlcHJlc2VudGF0aW9uIGFuZCBjcmVhdGl2ZSB3b3JrIGFpZGVkIGJ5IG1hY2hpbmUgdW5kZXJzdGFuZGluZyBvZiBsYW5ndWFnZS4gSSBwcm90b3R5cGUgc29mdHdhcmUgaW50ZXJmYWNlcyB0aGF0IGhlbHAgdXMgYmVjb21lIGNsZWFyZXIgdGhpbmtlcnMgYW5kIG1vcmUgcHJvbGlmaWMgZHJlYW1lcnMu  This text appears to be a base64encoded string. When decoded, it reads:

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