Find number of 3 between 1 100

from 1-100
no's of 2 to 9 each are 20...
10 years agoHelpfull: Yes(5) No(0)
ans-20
reson- 3,13,23,43,53,63,73,83,93(total no of 3 is 9)
30,31,32,33,34,35,36,37,38,39(total no of 3 is 11)
so total no of 3 in b/w 1 nd 100 is (9+11)=20
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20 there will be 10 3s at unit place and 10 3s at tens place.
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20.. der r 10 3's like 3,13,23,...... and 10 3,s from 30 to 39...
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in this question
on the place of unt digit have 11,3
and
on the ten place also have the 11, 3
so total no. of 3 is 22
but in a unit digit 33 is repeted two times so
22-2=20
ans is 20
10 years agoHelpfull: Yes(0) No(0)
Total number of 3 between 1 & 100 will be 20

3,13,23,43,53,63,73,83,93 (total no. of 3 is 9)

30,31,32,33,34,35,36,37,38,39 (total no. of 3 is 10)

therefore total number of 3 in between 1 & 100 is (9+10)=19
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1.
since there is only one 3
10 years agoHelpfull: Yes(0) No(2)

Find number of 3 between 1 & 100?