MCQ
For all $n \geq 2,n \ n^2 (n^4 > 1)$ is divisible by:
- ✓$60$
- B$50$
- C$40$
- D$70$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Age | $15$ | $16$ | $17$ | $18$ | $19$ | $20$ |
| No. of students | $5$ | $8$ | $5$ | $12$ | $X$ | $Y$ |
If the mean deviation about the median is $1.25$ , then $4 x+5 y$ is equal to :