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Numerical Ability
Arithmetic
99^n is such a number begin with 7, least value of n?
Read Solution (Total 5)
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- Ans will be 21.
99(100 - 1) = 9900-99= 9801
9801(100 - 1) = 980100-9801= 971299
971299(100 - 1) = 97129900 - 971299 = 96157601
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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. - 7 years agoHelpfull: Yes(20) No(6)
- 99^23=7936142836
- 6 years agoHelpfull: Yes(6) No(2)
- n=3
99^3=729 - 6 years agoHelpfull: Yes(3) No(18)
- not possible
because 99^n=9801 - 7 years agoHelpfull: Yes(0) No(11)
- 99^3 has 7 starting
- 6 years agoHelpfull: Yes(0) No(5)
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