One of them is twelve and the other is a dozen. They both equal 12.
There are five such numbers.
Write them as decimals, and compare. If the first digit of two numbers is equal, compare the second digit; if the second digit is equal, compare the third digit, etc.
93 and 42
2,4,6,8,10,12,14,16,18
Two (or four) digits added together cannot equal 42. Two-digit numbers multiplied together cannot equal 82.
11, 22, 36 and 84
89 x 90 = 8010 which are two consecutive two digit numbers that equal 8010.
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.
70 and 90
The same as the number of two-digit numbers, since the last two digits must the same as the first two, only reversed. So I'll say there are 100 four-digit palindromes.
25 and 36 are each equal to their rightmost digit squared. 25 = 5 X 5 36 = 6 X 6
The same as the number of two-digit numbers, since the last two digits must the same as the first two, only reversed. So I'll say there are 100 four-digit palindromes.