railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Number System LCM and HCF

ଯଦି x ଏବଂ y ର ଗରିଷ୍ଠ ସାଧାରଣ ଗୁଣିତକ (ଗସାଗୁ) 15 ଅଟେ, ତେବେ 36x2 - 81y2 ଏବଂ 81x2 - 9y2 ର ଗସାଗୁ  ______ ଦ୍ଵାରା ବିଭକ୍ତ। 

1
135
2
120
3
180
4
90
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