99*99=9801
Add the two greatest possible four digit numbers. 9999 + 9999
198
what is the least possible sum of two 4-digit numbers?what is the least possible sum of two 4-digit numbers?
100/7 = 14.2 therefore the answer is 14 (for the numbers 14,28,42,56,70,84,98)
3567,924
There are 2941 4-digit numbers such no two of its digits differ by 1.
There are 90 two-digit numbers possible. The first digit can range from 1 to 9 (9 options), while the second digit can range from 0 to 9 (10 options). Therefore, the total number of two-digit numbers is 9 (first digit) multiplied by 10 (second digit), which equals 90.
10000 and 99999
95
The greatest two-digit prime number is 97. The lowest two-digit prime number is 11. The product of the two numbers is equal to 1067.
93
Their product.