In the numbers from $100$ to $1000$ , how many times digit $1$ comes at the ten's place?

9

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10

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90

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900

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Solution

The correct option is A $90$
The digit $1$ comes at the ten's place in numbers from $110$ to
$119$ , $210$ to $219$ , $310$ to $319$ , $410$ to $419$ ,
$510$ to $519$ , $610$ to $619$ , $710$ to $719$ , $810$ to
$819$ , $910$ to $919$ .
$∴$ Required number $= 10 \times 9 = 90$ .

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In the numbers from 100 to 1000, how many times digit 1 comes at the ten's place?

The correct option is A 90The digit 1 comes at the ten's place in numbers from 110 to 119, 210 to 219, 310 to 319, 410 to 419, 510 to 519, 610 to 619, 710 to 719, 810 to 819, 910 to 919.∴ Required number=10×9=90.

In the numbers from $100$ to $1000$ , how many times digit $1$ comes at the ten's place?

The correct option is A $90$
The digit $1$ comes at the ten's place in numbers from $110$ to
$119$ , $210$ to $219$ , $310$ to $319$ , $410$ to $419$ ,
$510$ to $519$ , $610$ to $619$ , $710$ to $719$ , $810$ to
$819$ , $910$ to $919$ .
$∴$ Required number $= 10 \times 9 = 90$ .