the Gupta period made important contributions. They were the first to use algebra, develop the idea of zero, and explain the concept of infinity; something without an end. They were also the first to use the numbers 1-9 for counting. Early Indians also invented mathematical algorithms.
Trick question, Hans hat viele Freunde, Marco & Urs being Swiss and are traveling to Africa are irrelevant. It's a Logic question and a dumb one for that matter.
It says bring them in the right order and then write the letter correctly. You want to have a week of ski trip at the end of February. You have four children, 5 to 13 y/o you need a double room and a four bed room and halfpesion