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23a7b is divisible by 45 but not by 10. Find the value of a.

  • Option 1)

    1

  • Option 2)

    2

  • Option 3)

    5

  • Option 4)

    4

  • Option 5)

    3

Answers (1)
R rishi raj

Number which is divisible by 45 should be divisible by 5 and 9 but not by 10

Last digit must be 5 not 0

B=5

2+3+a+7+5 \: must\: be\: divisible\: by\: 9

17+a

A=1

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