19 + 21 + 23 = 63
189
7 and 9
63 / 3 = 21The middle number is 21The odd numbers next to 21 are 19 and 2319 + 21 + 23 = 63
63 = 23 + 23 + 17 so 2 times with 17 remaining
19 + 21 + 23 = 63
23½ and 39½
20 and 43
7 times 9 equals 63
The Highest Common Factor (HCF) of the two numbers is 3. 63/3 = 23 and 51/3 = 17.
63
189
7 and 9
47
The Least Common Multiple (LCM) for 23 63 is 1,449
63/69 = 21/23
63/23 cannot be simplified further.