Question

15. I have a total of rupees 1000 in ten and five rupee notes. If rupee notes that I have is ten more than the
number of five rapee notes, how many notes do I have in each denomination?​

Answer 1

Answer:

let number of Rs 5 notes be x

then number of Rs 10 notes be x + 10

so, 5x + 10(x + 10) = 1000

5x + 10x + 100 = 1000

15x = 900

x = 60

so Rs 5 notes = 60

and Rs 10 notes = 70

Answer 2

Number of ten rupee notes be (x + 10)

Amount due to five rupee notes = 5 × x = 5x

Amount due to ten rupee notes = 10 (x + 10) = 10x + 100

The total amount = Rs 1000

5x + 10x +100 = 1000

15x = 900

x = 900/15

= 60

∴ The number of five rupee notes are x = 60

Number of ten rupee notes are x + 10 = 60+10 = 70

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