412+ 413+ 414 + 415+416 =412(1+41+42+43+44) =412(1+4+16+64+256) =412(85+256) =412(341) According to the option, 341 is divisible by only 11.so the total number is divided by 11.
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For a non-relativistic particle, the ratio of phase velocity to group velocity of de Broglie waves is:
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