6. What is the reminder when the positive x is divided by 4?
(1)When x^2 is divided by 4, the reminder is 1.
(2)When x is divided by 2, the reminder is 1.
7. Sofa 和 armchair 的进价相等,销售时,armchair 比进价提高 10%,sofa 比 armchair 销售价提高 20%。求 sofa 的利润比 armchair 的利润高百分之 几?(The gross profit in the X company’ sofa is what percent greater than the gross profit in its armchair?)