(6 * 10^a) + (6 * 10^b) + (6 * 10^c) = 6006.6
Write down a possible set of values of a, b and c.

  (a, b, c) = (3, 0, -1)

Step-by-step explanation:

The number 6006.6 can be written in expanded form as ...

  6006.6 = 6×10³ +6×10⁰ +6×10⁻¹

Matching this to your expression with a, b, c suggests ...

  (a, b, c) = (3, 0, -1) . . . . . in any order

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step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !