Loading....
Coupon Accepted Successfully!

Quantitative Aptitude

Open Flashcards

Number Systems and Ratio & Proportion

Question
1 out of 30
 

A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is:

A 18
B 24
C 42
D 81
E None of These
Ans. B 10x + y = 10y + x – 18

9x – 9y + 18 = 0

X – 4 + 2 = 0 x = y -2

X x y = 8 x =2, y = 4

No. = 24

Number Systems and Ratio & Proportion Flashcard List

30 flashcards
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)