Question

(d) Find the sum of first 50 natural numbers which are divisible by 5.​

Answer 1

Answer:

the sum of first fifty natural no. divisible by 5 is 6375

Answer 2

Question: Find the sum of first 50 natural numbers which are divisible by 5.

Answer:

The number series 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 ,...., 250.

The first term(a)=5

Common Difference(d)=5    (10-5=5,15-10=5 and so on)

We can apply Arithmetic Progression( A.P) Formula:

n÷2×(a+Tn)  (n is subscript) below T

50÷2×(5+250)

50×255÷2

12750÷2

6375

5, 10, 15, 20, 25, 30, 35, 40, 45, 50 ,...., 250=6375

∴6375 is the sum of first 50 natural numbers which are divisible by 5.​

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