Meher saves Rs 4 in first week, Rs 13 in the second week, and Rs 22 in the third week. In which week will her savings reach Rs 130?
Answer: 15th week
Explanation
The sequence of savings is:
4, 13, 22, ... with a common difference of 9.
Let's find the week when savings reach 130:
4 + (n-1)9 = 130
(n-1)9 = 126
n-1 = 14
n = 15
The savings will reach Rs 130 in the 15th week.
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