A number is decreased by 10% and then increased by 10%. The number so obtained is 10 less than the original number. What is the original number? |
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a) |
110 |
b) |
900 |
c) |
1000 |
d) |
800 |

A number is decreased by 10% and then increased by 10%. The number so obtained is 10 less than the original number. What is the original number? |
|||||||

a) |
110 |
b) |
900 |
c) |
1000 |
d) |
800 |

1 Answer

127 votes

Let the original number be

After 10% decrease and then 10% increase, final number = 90% of (110% of

=

According to problem, we have

127 votes

127