If you add 419 to 263 the answer is 682 and the Roman numeral for this number is DCLXXXII
420 + 260 = 680
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Compatible numbers are numbers that look friendly with each other when we do mental calculation to estimate a product or a quotient.So 420 would be an example for 419.Say I want to divide 419 by 2.I can do it easily for 420, it is 210But I increased 419 by 1 so I need to subtract half of 1 which is .5 and the answer is 209.5.I subtracted half or .5 since I increased 419 by 1 and I am dividing by 2.
Any multiple of 419.
A prime number is one that can only be divided by 1 and itself. 419 can only be divided by 1 and itself, therefore it is a prime number.
140 + 420 = 560
The answer is 419