Latest TCS Aptitude Question SOLUTION: 99^n is such a number begin with 7, least value of n?

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(#M40164461) TCS Numerical Ability question Keep an EYE

99^n is such a number begin with 7, least value of n?

Asked In TCS Devendra Marghade (8 years ago)

Unsolved Read Solution (5)

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Read Solution (5) :

Sandeep Khanna  (7 years ago)

Ans will be 21.
99(100 - 1) = 9900-99= 9801

9801(100 - 1) = 980100-9801= 971299
971299(100 - 1) = 97129900 - 971299 = 96157601
.....
.....
Just observe the pattern, 98, 97, 96, .... for power of 2, 3, 4, .... So for 90 the power could be 10. So for 11, you get a number starts with 8.And Similarly for 21 number starts with 7.

Is this solution Helpfull? Yes (20) | No (6)  

Riya malaiya  (7 years ago)

99^23=7936142836

Is this solution Helpfull? Yes (6) | No (2)  

Puspanjali Praharaj  (7 years ago)

n=3
99^3=729

Is this solution Helpfull? Yes (3) | No (18)  

Niladree Dutta  (8 years ago)

not possible
because 99^n=9801

Is this solution Helpfull? Yes | No (11)  

Bale Vivek  (7 years ago)

99^3 has 7 starting

Is this solution Helpfull? Yes | No (5)  

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