1.43, 1.87 এবং 20.9 এর গ.সা.গু নির্ণয় করুন। A. 11 B. 1 C. 0.11 D. 110

Multiply by 100: 143 = 11 × 13, 187 = 11 × 17 and 2090 = 11 × 190, so their HCF is 11. Dividing back by 100, the HCF of 1.43, 1.87 and 20.9 is 0.11.