Question

Up to 800 how many numbers are divisable by 2?

Answer 1

Answer:

Step-by-step explanation:

a = 2

d = 2

an= 800

800 = a + (n-1)d

800 = 2 + (n-1)2

798 = 2n - 2

800 = 2n

n = 400

so total 400 nos are divisible by 2

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Answer 2

Answer:

Using AP

2, 4, 6,....... 800

a = 2

d = 2

Now

800 = 2 + ( n - 1 )2

800 = 2 + 2n - 2

800 = 2n

n = 400

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