Question

*maths quiz a lady forgot her bank 'atm pin' which is a four digit number, but luckily she remembered some hints on how to recall this 'pin' here are some of the clues : (1) the 1st digit is half of the 2nd (2) the sum of the 2nd and 3rd is 10 (3) the 4th is equal to the 2nd plus 1 (4) the sum of all the digits is 23 *what is her atm pin.......??????* ð¤

Answer 1

hope it's clear............

Answer 2

Answer: 4829

let first digit be x =y/2

second ditgit be y, third be a and forth be b which is y+1

since y+a=10 then

Now from x+y+a+b=23

Substitute y/2+10+y+1=23

y/2+y=23-11

3y/2=12

3y=12×2

3y=24

y=24/3

y=8 is the second digit

when you substitue 8 where there is y you get; first 8/2=4, third 10-8=2, forth 8+1=9