(i) दर्शाइए कि 7 xx 11 xx 13 + 17 एक भाज...

(i) दर्शाइए कि `7 xx 11 xx 13 + 17` एक भाज्य संख्या है|
(ii) दर्शाएं कि `5 xx 7 xx 13 - 5` एक भाज्य संख्या है|
(iii) दर्शाएं कि `5 xx 7 xx 11 xx 13 + 55` एक भाज्य संख्या है|

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