Question

please help me.....


kindly don't spam....​

Answer 1

Answer:

$\large \mathscr{\color{navy}{Given}}\\ \bold \pink{21y5 \: is \: a \: multiple \: of \: 9 where \: y }\\ \bold \pink{\: is \: digit . \: what \: is \: the \: value \: of \: y }\\ \large\mathscr{\color{darkblue}{solution}}\\ 21y5 \: is \: a \: multiple \: of \: 9 \\ \bold{ \therefore \: 2 + 1 + y + 5 \: is \: also \: the \: multiple \: of \: 9} \\ \bold{ \therefore \: 8 + y = 9 }\\ \bold{\therefore \: y \: = 9 - 8} \\ \bold{\therefore \: y \: = \: 1} \\ \large \mathscr{\color{darkblue}{Given}} \\ \bold \pink{31z5 \: is \: a \: multiple \: of \: 9 \: where \: z \:} \\ \bold \pink{is \: a \: digit \: . \: what \: is \: \: the \: value \: of \: z \: }\\ \large\mathscr{ \color{darkblue}{solution}}\\ 31z5 \: is \: a \: multiple \: of \: 9 \\ \bold{ \therefore \: 3 + 1 + z + 5 \: is \: also \:the \: multiple \: of \: 9 }\\ \bold{ \therefore \: 9 + z = 9} \\ \bold{\therefore \: 9 + z = 9 \: or \: 18} \\ \bold{\therefore \: z = 9 - 9 \: or \: 18 - 9} \\ \bold{ \therefore \: z \: = 0 \: or \: 9 }\\ \\ \\ hope \: it \: helps \: u.......$