Question

A two digit number is made up of the digits 9 and 8 when rounded off to the nearest ten it gives 90. the number is​

Answer 1

let the number be 10x+y

assume that x=9 and y=8, then,

the number is 98

rounding off 98 gives 100

not 90

so,our assumption is wrong

If x=8 and y=9, then,

the number is 89

rounding off 89 gives 90

therefore,the number is 89