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

જો x અને y નો ગુરૂતમ સામાન્ય અવયવ (ગુ.સા.અ.) 15 છે, તો 36x2 - 81y2 અને 81x2 - 9y2 નો ગુ.સા.અ.  ______ વડે વિભાજ્ય છે.

1
135
2
120
3
180
4
90
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