Write all possible two-digit numbers using the digits $4 . 0 a n d 9$ . Repetition of digits not allowed. Also find their sum.

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Solution

All possible two-digit numbers when repetition of digits not allowed
$40, 49, 94, 90$
$S u m : 40 + 49 + 94 + 90 = 273$

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Write all possible two-digit numbers using the digits 4.0and9. Repetition of digits not allowed. Also find their sum.

All possible two-digit numbers when repetition of digits not allowed40,49,94,90Sum:40+49+94+90=273

Write all possible two-digit numbers using the digits $4 . 0 a n d 9$ . Repetition of digits not allowed. Also find their sum.

All possible two-digit numbers when repetition of digits not allowed
$40, 49, 94, 90$
$S u m : 40 + 49 + 94 + 90 = 273$