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Answer:
35
Step-by-step explanation:
The number of houses preceding x is x - 1.
It can be observed that Sum of the number of houses preceding the house numbered,x = 1 + 2 + 3 + ... + x - 1.
These numbers form an AP with a = 1, d = 1, n = 49.
∴ Sum of n terms of an AP sn = (n/2)[2a + (n - 1) * d]
Now,
Sₓ₋₁ = S₄₉ - Sₓ
However the house numbers are positive only, The value of x will be 35.
Therefore, the value of x is 35.
Hope it helps!
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Answer:
Step-by-step explanation: