Question

Aarti added 2 two digit number . which of these COULD be the sum that she obtained
Options
A)17
B)179
C)199
D)219

Answer 1

your answer (B) 179 .

its because sum of the digits of 2 two digits numbers can not be more than 198.
greatest two digit number = 99

let 2 two digits numbers are ,99,99

sum = 99 + 99 = 198

199 and 219 are greater than 198 so these two numbers she cannot obtained as a sum and 17 is too small ,so we can neglect this option.

required sum she obtained will be
=80 + 89 = 179

Answer 2

When we see the option we came to know that 17 can't be mad from 2 two digit no.  Now 199 can have only one two digit no.  as if we take largest two digit number 99 then the other number will be hundred so it is also not possible Now if we take 219 it will also follow the above condition as 199 follows it can't be prepared by using 2 two digit numbers But when we take 179 it is the only number which can be prepared by using two digit number such as  179=89+90  179=93+86. etc   Show the answer is 179