QJEEM22Ma3767: JEE Main 2022 Mathematics - Class 11 JEEM22Ma3767 Solution: The total number of four digit numbers such that each of first…

If unit digit is 1 then $\rightarrow 9 \times$ s $10 \times 10=900$ numbers

If unit digit is 2 then $\rightarrow 4 \times 5 \times 5=100$ numbers

If unit digit is 3 then $\rightarrow 3 \times 4 \times 4=48$ numbers

If unit digit is 4 then $\rightarrow 2 \times 3 \times 3=18$ numbers

If unit digit is 5 then $\rightarrow 1 \times 2 \times 2=4$ numbers

If unit digit is 6 then $\rightarrow 1 \times 2 \times 2=4$ numbers

For $7,8,9 \rightarrow 4+4+4=12$ Numbers

Total $=1086$ Numbers