The four-digit number that gets reversed when multiplied by 9 is 1089. When you multiply 1089 by 9, you get 9801, which is 1089 reversed. This property makes 1089 a unique and interesting number in this context.
This is not true. Think about any 4 digit multiplied by 1. This remains a 4 digit. In the case of any 4 digit under 5000, multiplied by two would also be a 4 digit number
625×2=1250
32 is the smallest two-digit number that can be multiplied by itself to give a four-digit number. (32x32)=1024
1155
1
This is not true. Think about any 4 digit multiplied by 1. This remains a 4 digit. In the case of any 4 digit under 5000, multiplied by two would also be a 4 digit number
The product of a 4-digit number and a 1-digit number is not always a 5-digit number. The largest product you can get from multiplying a 4-digit number (9999) by a 1-digit number (9) is 89991, which is a 5-digit number. However, if you multiply a 4-digit number (1000) by a 1-digit number (1), you get 1000, which is a 4-digit number. Therefore, the product of a 4-digit number and a 1-digit number can range from a 4-digit number to a 5-digit number depending on the numbers being multiplied.
Six.
2178
2178. 2178 x 4 = 8712
It is 99. 99*99 = 9801
00000
32 x 32 = 1024
625×2=1250
32 is the smallest two-digit number that can be multiplied by itself to give a four-digit number. (32x32)=1024
1155
1111x9 =9999 1089 multiplied by 9 = 9801