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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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23a7b is divisible by 45 but not by 10. Find the value of a. Option 1) Option 2) Option 3) Option 4) Option 5)

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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)
$3$