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The sum of a two digit number and the nu...

The sum of a two digit number and the number formed by interchanging the digits is 110. If 10 is subtracted from the first number, the new number is 4 more than 5 times the sums of the digits of the first number. Find the first number.

Text Solution

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The correct Answer is:
`:.` The first number is 64
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The sum of two digit number and the number obtained by reversing the digits is 66. If the digits of the number differ by 2, Find the number. How many such numbers are there?

The number of 10 digit numbers that can be written by using the digits 2 and 3 is

Knowledge Check

  • The number of 10 digit number that can be written by using the digits 2 and 3 is

    A
    `.^(10)C_(2) + .^(9)C_(2)`
    B
    `2^(10)`
    C
    `2^(10)- 2`
    D
    10!

  • The number of 10 digit number that can be written by using the digits 2 and 3 is

    A
    `""^(10)C_(2)+""^(9)C_(2)`
    B
    `2^(10)`
    C
    `2^(10)-2`
    D
    `10!`

  • The sum of all 4 digit numbers of different digits formed with the digits 1, 2, 5 and 6 is

    A
    93324
    B
    90334
    C
    93234
    D
    90234

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