CUET Preparation Today
What is the last two digits of $2^{20}$? |
86 80 70 76 |
76 |
The correct answer is option (4) : 76 $2^{10}=1024≡24(mod\, 100)$ $(2^{10})^2≡(24)^2(mod\, 100)$ $2^{20}= 576(mod\, 100)$ $2^{20}= 76 (mod\, 100)$ Hence, the last 2 digits of $2^{20} $ are 76. |
