Daily Mail Mindbender

[AlicePym_7]

Christine gives away 10% of her Birthday Money. She then spends 4/9 of the remaining money leaving her with £45 less than the total amount. How much Birthday money did Christine receive?

[bobbinwales]

£90???

[bobbinwales]

you'll after check it works

[JJ109]

Let total received = X
90% X - (4/9*90%x) = X - 45
90% X - 40% X = X - 45
50% X = X -45
X = 2X - 90
X = 90 pounds

check 90 - 10% = 81
81 - 4/9*81 = 81 - 36 = 45
45 + 45 = 90

She received 90 pounds

[bobbinwales]

gets 90, gives away 9 so keeps 81
spends 4/9 of 81 which when at school was 36, that leave's 45
which is 45 less than 90
ta daah!