How many numbers are there from 10-99 in which the digits differ by three. a)10 b)11 c)12 d)13 e)14?

Answer 1

I get 13 --
14,25,30,36,41,47,
52,58,63,69,74,85,96

Answer 2

The right number is 2 x 7 = 14, so answer e.

Answer 3

14 and 41
25 and 52
36 and 63
47 and 74
58 and 85
69 and 96

14, 25, 30, 36, 41, 47, 52, 58, 63, 69, 74, 85, 96

ANS : 13

Answer 4

Please, it's not like I don't expect people to post their homework on this site, but you could at least change it slightly.
When you also post the choices it's too obvious to even be funny!
All this is in addition to the fact that the question is dead easy, it just requires you to sit down for 10 minutes and do it! By the time someone actually answers this, you could have already done it and actually learnt whatever your teacher thought you should know!

Answer 5

e) 14

Answer 6

13

That's too easy.

14 )--- add one to digits in14, 25 comes out
25
30 36 )--- There is some relation in these four lines
41 47 )--- i.e. add one to both digits
52 58 )--- because when a-b=3, (a+1) - (b+1) =3 , too
63 69 )
74 ---------add one to 74...85...96
85
96

Answer 7

i got 13 too. and i think that you should have given this a try first before asking. it really is isnt too difficult. as you can see, all we did was list out the numbers and i think you should know how to count up to a hundred right?

Answer 8

14
25
36
47
58
69
30
41
52
63
74
85
96

there are 13
^_^

Answer 9

14...25...30...36...41...47...
52...58...63...69...74
...85...96
looks like 13 to me

Answer 10

why don't people do their own homework?