Maths Fun - HotUKDeals
We use cookie files to improve site functionality and personalisation. By continuing to use HUKD, you accept our cookie and privacy policy.
Get the HUKD app free at Google Play

Search Error

An error occurred when searching, please try again!

Login / Sign UpSubmit

Maths Fun

craiglvssaz Avatar
8y, 1d agoPosted 8 years, 1 day ago
I am quite clever at Maths this but this is really bugging me, I saw this on another forum

Make 69 using the following numbers: 7 8 8 9 9

You can only use each number once and can only add, subtract, multiply and divide

Good Luck all I am gazzumped
craiglvssaz Avatar
8y, 1d agoPosted 8 years, 1 day ago
Options

All Comments

(18) Jump to unreadPost a comment
Comments/page:
#1
9 x 8 = 71
9 - 7 = 2
subtract the 2
=69
#2
9*8 thought was 72
#3
You need to use every number, I should have put that in at the start. Sorry
#4
Lockstockdude
9 x 8 = 71
9 - 7 = 2
subtract the 2
=69


9x8 is 72....71 is prime

John
#5
haha figured afterwards school boy error
#6
pretty sure 9 x 8 is 72.............................
#7
I can get to 68 and 70 but I feel it is impossible but hey I may be proven wrong. Been trying to do it since yesterday just cannot get it out my head, am funny with that sort of thing
#8
I can get 69.875 lol
#9
Is it cheating to do 78 - 8 - (9/9) = 69?
Do I have to use each digit as an individual number?
#10
Why did it have to be 69?
#11
9x8=72
square root 9=3
72-3=69
8 - 7 = 1, 69 x 1 = 69
#12
Old Bear
Is it cheating to do 78 - 8 - (9/9) = 69?
Do I have to use each digit as an individual number?


Yes that's cheating lol, what would Vorderman say!
#13
I haven't got a clue why it is 69 and like I said you can ony use each number once and all numbers have to be used. You can ADD, SUBTRACT, MULTIPLY & DIVIDE. Just think of countdown lol

Such as

68 is 8 X 9 = 72, 7 - 9 = 2 / 8 = 4, 72 - 4 = 68
70 is 8 X 9 = 72, 9 - 7 = 2, 72 - 2 = 70
#14
andymack;4163902
pretty sure 9 x 8 is 72.............................

haha... pretty sure 9 x 8 is 71 :thumbsup:
banned#15
strike
9x8=72
square root 9=3
72-9=69
8 - 7 = 1, 69 x 1 = 69


Thought that myself but would it count since

You can only use each number once and can only add, subtract, multiply and divide
#16
I tihnk someone's having you on mate.
#17
I agree but I thought I would try on here to see if there was any unknown mathematic genius that could solve it, I will keep trying though unless it is proven impossible cause it is really ticking me off now
#18
7+8+8 = 23

Turn one 9 upside down to make it a 6

9-6 = 3

Multiply the totals of the above two sums 23 x 3 = 69 :)

NV

Post a Comment

You don't need an account to leave a comment. Just enter your email address. We'll keep it private.

...OR log in with your social account

...OR comment using your social account

Thanks for your comment! Keep it up!
We just need to have a quick look and it will be live soon.
The community is happy to hear your opinion! Keep contributing!