>Purchase 5 continus rechrge coupons.
>Add 1654 to 1st one & 1653 for 2nd one.
>Do this for 5 cards & get 2 time recharge value.
Add 1027 and multiply by 3 to used recharge cards ending with 63 and neglect last few digits to get double recharge.
Use recharge coupons starting number 98 ,add 9687 or multiples and neglect carry