**B.1241. ****There are three different kinds of chocolate you can buy in the candy store around the corner. If you buy a bar of chocolate with peanuts and a bar of chocolate with almond you pay $3.50. If you buy 4 bars of chocolate with peanuts, 4 bars of chocolate with almond and 3 bars of chocolate with berries, you pay $18.50. How much does a bar of chocolate with berries cost?**

**B.1242.**** Peter’s mom sent him to the store and told him what to buy: milk, seltzer, bread, eggs, and donuts. By the time Peter got to the store he could remember only that he had to buy 1 liter, 6 pieces, a half a kilogram, 10 pieces and 3 liters of the items, but he could not remember which amount belonged to which item. He received $7.00 from his mom, so he knew it should be enough money to buy everything he had to. He saw in the store that 1 liter of milk costs $2.00, 1 liter of seltzer costs 59 cents, 1 piece of donut costs 12 cents, 1 egg costs 20 cents, and 1 kg of bread costs $1.50. How much or how many did Peter have to buy from each item?**

**B.1243.**** What is the greatest number of 4 cm x 6 cm cards that can be cut out of a 20 cm x 32 cm sheet of paper? Describe how it can be done.**

**B.1244.**** For some numbers the sum of the digits is 2019. How many digits does the smallest such number have?**

**B.1245.**** An energy efficient light bulb costs $18.00. It works for 10,000 hours, and the electricity it uses up every hour costs 0.8 cents. A regular light bulb with the same brightness costs $0.40. It works for 1,000 hours and the electricity it uses up every hour costs 3.4 cents. How much money do you save during the lifespan of an energy efficient light bulb?**

**B.1246.**** ****What is the largest prime such that the sum of its digits is greater than the number of primes up to it?**

**B.1247.**** ****What is the greatest 2-digit number that can be written as the sum of 2 different primes in 7 different ways?**

**B.1248.**** In an increasing order we wrote down all those 3-digit numbers whose digits are not all different.**

**a) Where in this order is 133?**

**b) What is the 28th such number?**

**Please send your solutions here.**

The **Sharma Kamala Educational Trust** is sponsoring the participation of students from India. So, if you are **a student living in India**, please, send your solutions to: Group B from India