Combinatorics 2

Justin has 8 $1 coins, 1 $2 coins and 2 $5 coins. How many ways can he buy for a book cost $8 without any change?

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Peter has 7 $1 coins, 2 $2 coins, and 1 $5 coins. How many ways can he buy a $7 souvenir without any change?

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Michael has 6 $1 coins, 4 $2 coins, 2 $5 coins. At most how many pencils at can he buy given that each pencil costs $4?

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Diane shares the sweets with her two friends equally. How many sweets does each of them get?

Mr John had some coins as shown above. He gave the coins to his daughter and three sons equally. How many coins did each child get?

10 marbles are divided into 2 groups. How many ways are there to divide the marbles so that each group has an odd number of marbles

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A 2-digit even number can be formed using these digits: 0, 2, 4, 6 and 9 without repetition. How many such numbers are there?

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Sam has 6 pencils. Amy has 14 pencils. How many pencils does Amy need to give Sam so that each has the same number of pencils?

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The cherries are divided equally into groups of 3. How many groups are there?

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Mom has some candies as shown in the picture. She wants to divide the candies equally among her 3 children. At least how many candies is she left with?

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