Question

Ammu has a savings box. She deposits
1/- on the first day 2/- on 2nd day
3/- on 3rd and so on. After
some days she found 171 /- it in the box.
How many days she took
for this total deposit?
Form a second degree equation ​

Answer 1

Answer:

18

Step-by-step explanation:

$(n)(n + 1) \div 2$

sum of n natural numbers is is given by the above formula.

(n)(n+1)/2= 171

n(n+1) = 342

18*19= 342

so n= 18.

Answer 2

Step-by-step explanation:

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