When Koko the Koala does not sleep, he eats 50 grams of leaves per hour. Yesterday, he slept 20 hours. How many grams of leaves did he eat yesterday?

Adam built fewer sandcastles than Martin but more than Susan. Lucy built more sandcastles than Adam and more than Martin. Dana built more sandcastles than Martin but fewer than Lucy Who of them built the most sandcastles?

. Some candies were in a bowl. Sally took half of the candies. Then Tom took half of the candies left in the bowl. After that Clara took half of the remaining candies. In the end there were 6 candies in the bowl. How many candies were in the bowl at the beginning?

Rabbit Borya likes cabbages and carrots very much. In a day he eats either 9 carrots, or 2 cabbages, or 1 cabbage and 4 carrots. During one week Borya has eaten 30 carrots. How many cabbages has he eaten during this week?

. On Kangaroo planet each kangyear has 20 kangmonths and each kangmonth has 6 kangweeks. How many kangweeks are there in one quarter of a kangyear?

Daniel had a package of 36 candies. He divided all the candies equally among all his friends. Which of the following was definitely not the number of friends?

Vero’s mum prepares sandwiches with two slices of bread each. A package of bread has 24 slices. How many sandwiches can she prepare from two and a half packages of bread?

When Pinocchio lies, his nose gets 6 cm longer. When he tells the truth, his nose gets 2 cm shorter. When his nose was 9 cm long, he told three lies and made two true statements. How long was Pinocchio’s nose afterwards?

In a shop you can buy oranges in boxes of three different sizes: with 5 oranges, with 9 oranges or with 10 oranges. Pedro wants to buy exactly 48 oranges. What is the smallest number of boxes he can buy?

30 children from Adventure Park took part in events. 15 of them took part in the ”moving bridge” contest, and 20 of them went down the zip-wire. How many children from Adventure Park took part in both events?

The number 35 has the property that it is divisible by the digit in the unit position, because 35 divided by 5 is 7. The number 38 does not have this property. How many numbers greater than 21 and smaller than 30 have this property?

After the First of January 2013, how many years will pass before the following event happens for the first time: the product of digits in the notation of the year is greater than the sum of these digits?

Baby Roo wrote down several numbers using only the digits 0 and 1. The sum of these numbers is 2013. It turned out that it is impossible to get the same sum with a smaller number of summands of this kind. How many numbers were written by Baby Roo?