Question

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Subject - Maths + Mental ability..

Answer 1

Heya!

Here is yr answer....


The no. of lockers opened are....in the form of square nos.

like -------

1² = 1
2² = 4
3² = 9
4² = 16
5² = 25
Etc....


The no. of lockers are 1000


The square no. less than or equal to 1000

31² = 961

So,

the ans is 31 lockers


Hope it hlpz..