alleryଧନାତ୍ମକ ହର ଥିବା ପରିମେୟ ସଂଖ୍ୟା a/b ଏବଂ c/d ପାଇଁ, a/b < c/d ଠିକ୍ ସେତିକିବେଳେ ସତ୍ୟ ହୁଏ ଯେତେବେଳେ:
Aa + d < b + c
Ba - d < b - c
Ca x d < b x c
Da x b < c x d
Answer & Solution
Correct answer: C. a x d < b x c
ଉଭୟ ପାର୍ଶ୍ୱକୁ ଧନାତ୍ମକ ଗୁଣଫଳ b × d ଦ୍ୱାରା ଗୁଣନ କଲେ ବଜ୍ର ଗୁଣନ (cross product) ସର୍ତ୍ତ ପ୍ରାପ୍ତ ହୁଏ।
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