defence exam CRPF Head Constable Ministerial & ASI 2022 Mock Test Quantitative Aptitude Number System LCM and HCF
What is the highest common factor of \({1 \over 2}, {3 \over 4},{5 \over 6},{7 \over 8}\) and \({9 \over 10}\)?
1
\({1 \over 210}\)
2
\({1 \over 21}\)
3
\({1 \over 12}\)
4
\({1 \over 120}\)