Question

Can someone give me a neccasary condition statement and a sufficient condition.

Answer 1

Any particular context? Like geometry statements or somethin'?

Answer 2

for n to be a natural number is necessary that n≠-1

Answer 3

it is necessary that n is a positive integer

Answer 4

if b is a number divisible by 4

is necessary that b is even , but it is not sufficient

it is sufficient that b is 8 but it is not necessary

Answer 5

when the conditions between statements are both necessary and sufficient , the statements are equivalent

Answer 6

See also: http://themathpage.com/aBookI/logic.htm#hypothesis