Question

Danish has a few 5 rupees and 2 rupees coins and the total value is ₹18. The number of two rupees coins that danish has

Answer 1

let the no. of 2 rupee coins=x=9
" " " 5 " " =18-2x=0
atq

2x+5(18-2x)
2x+90-10x=18
-8x+90=18
-8x=18-90
-8x=-72
x=9

Answer 2

Answer:

Danish has two 5 rupees coin and four 2 rupees coin  

Step-by-step explanation:

Case 1:-

If danish has one 5 rupee coin then 18 -5 = 13( not an even)

since, 2 rupee coin will give even number sum

Case 2:-

If danish has two 5 rupee coin then 18 -2 *5 = 18 -10 =8 ( even)

so, 8 will be made up with four coins of 2 rupee ( 8 = 4*2 )

Case 3:-

If danish has three 5 rupee coin then 18 -3 *5 = 18 -15 =3 ( not an even)

since, 2 rupee coin will give even number sum

Hence, Danish has two 5 rupees coin and four 2 rupees coin