Nishi has 5 coins, each of the different denomination. Find the number different sums of money she can form.

A person X has four notes of rupee 1, 2, 5 and 10 denomination. The number of different sums of money she can form from them is

The sum of two numbers is 7 and their difference is 5. Find the numbers.

A sum of₹ 500 is in the form of denominations of ₹5 and ₹10. If the to tal number of notes is 90 find the num- ber of notes of each denomination: (Hint: Let the number of 5 rupee notes be 'x', then number of 10 rupee notes = 90 - x)

A has 50 coins of 10 paise denominations. While B has 10 coins of 50 paise denominations. C has 20 coins of 25 paise denomination while D has 25 coins of 20 paise denominations. The average number of paise per person is :