The least number of coins required to make ₹ 70 using ₹ 10 coins is ____.
Manu has only ₹ 1 and ₹ 2 coins. If he wants to buy a notebook that costs ₹ 23, what is the least number of coins he needs ?
Manu needs ₹7.50 to buy an eraser. He already has a few ₹2 coins and a few 50 paise coins with him. How many ₹2 coins and 50 paise coins will Manu need to buy the eraser such that he uses the least number of 50 paise coins?