Question

Using different digits with 4 in tens place

Answer 1

Step-by-step explanation:

Since the number required has to be a 4-digit number, 0 cannot occupy the thousands place. So the next least number is 1 occupies the thousands place. Now 0 can be used in the hundreds place. It is given that 9 should be in tens place. The next least number after using 0 and 1 is 2 to be put in the units place. Hence the smallest 4-digit number with 9 in the tens place using different digits is 1092