HCU MCA 2014 Paper

There are 6 coins in a purse whose value is Rs. 1.15. The possible denominations of the coins are Rs 1,50 ps, 25ps, 10 ps, 5ps. Which denomination CANNOT be in the purse, if from the 6 coins, no change can be given for Rs 1,50ps, 25ps, or 10ps?