MBA Exam

A group of students is to be divided into some rows such that all the rows have an equal number of students. When 7 students are put in each row, 3 students are left; when 8 students are put in each row, 5 students are left; and when 9 students are put in each row, 7 students are left. If 12 students are put in each row, then how many students will be left?Can someone explain the CRT approach to it?

1) 1
2) 3
3) 5
4) 7

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MBA Other Question

If [log10 1] + [log10 2] + ……. [log10 n] = n, where [x] denotes the greater integer less than or equal to x, then

1) 1
2) 2
3) 3
4) 4
5) 5
how many triangles??? i do not have OA.. post your approach also...attachment not visible??