Câu 6: Write >; <; = in the blank: 1818/2121......7272/7373
Câu 7: Which of the following calculations equals 5/36
Câu 8: Find x, y such that when N = is divided by 2; 5 and 9, the remainder is 1.
A – x = 1 and y = 3 B – x = 2 and y = 2
C – x = 7 and y = 6 D – x = 3 and y = 1
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