Question

These ones are always tricky for me!!!

Answer 1

Answer:

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$5 × [ ] × [. ] = 245$

let the missing number be X

$5 × [ x ] × [. x ] = 245$

$5$× ${x}^2$= $245$

on diving the whole equations by 5

$5$× ${x}^2$/ 5= $245$ / 5

${x}^2$= $49$

${x} × {x}$= $7 × 7$

on comparing them we get x = 7

so missing number is 7