alleryବିବୃତି: ଯଦି ଏକ ସଂଖ୍ୟା 6 ଦ୍ୱାରା ବିଭାଜ୍ୟ, ତେବେ ଏହା 2 ଦ୍ୱାରା ବିଭାଜ୍ୟ। ସଂଖ୍ୟା N, 2 ଦ୍ୱାରା ବିଭାଜ୍ୟ ନୁହେଁ। କ’ଣ ନିଷ୍କର୍ଷ ବାହାରୁଛି?
AN, 6 ଦ୍ୱାରା ବିଭାଜ୍ୟ ନୁହେଁ
BN, 6 ଦ୍ୱାରା ବିଭାଜ୍ୟ
CN, 3 ଦ୍ୱାରା ବିଭାଜ୍ୟ
DN ଏକ ଯୁଗ୍ମ ସଂଖ୍ୟା
Answer & Solution
Correct answer: A. N, 6 ଦ୍ୱାରା ବିଭାଜ୍ୟ ନୁହେଁ
ପ୍ରତିପରିବର୍ତ୍ତନ (contraposition) ଦ୍ୱାରା: ଯଦି ବିଭାଜ୍ୟ(6) -> ବିଭାଜ୍ୟ(2), ତେବେ ବିଭାଜ୍ୟ ନୁହେଁ(2) -> ବିଭାଜ୍ୟ ନୁହେଁ(6)।
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