一个老和尚颈上挂着一串佛珠。别人问他佛珠有多少颗时，老和尚回答：“大约有100多颗吧！3颗3颗地数，正好数尽；5颗5颗地数，最后余3；7颗7颗地数，最后也余3。”旁人听了，仍弄不清佛珠的数目。你知道有多少颗佛珠吗？

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