**A.1281. ****Odett drew into a square all of its axes of symmetry. A total of how
many triangles and quadrilaterals are there on the picture?**

**A.1282.**** Find all those 2-digit numbers in which the sum of the digits is odd,
and it (the sum of the digits) remains odd even if you add one to the number.**

**A.1283.**** How many 3-digit numbers do not contain the digit 5?**

**A.1284.**** There are red, blue, and yellow cubes in a black bag. You have to take
out 15 of them randomly in order to have a yellow in your hands for sure, you
have to take out 17 of them randomly in order to have a red in your hands for
sure, and you have to take out 19 of them randomly in order to have a blue in
your hands for sure. How many cubes of each color are there in the bag?**

**A.1285.**** On the diagram each arrow points towards the taller penguin. One of the
penguins is 92 cm tall. There is a taller by 16 cm and two shorter penguins,
one of them by 37 cm and the other by 54 cm shorter. How tall is each penguin?**

**A.1286.**** The King Penguin feeds its big baby every third day. Each time she
gives her baby about 3 kg of calamari. Each calamari has a mass between 150
grams and 200 grams. Hunting for food, the King Penguin dives 860 times a day,
and only a tenth of them are successful.**

**a) At least how many
calamaris does the mama penguin have to catch if she wants to feed her baby for
3 weeks?**

**b) During the 3 weeks, how
many times does the mama penguin dive unsuccessfully?**

**A.1287.**** The number of penguins in this colony is the greatest even number which
when rounded to the nearest hundreds is 1300, and if you round it to the
nearest tens then the sum if its digits is 9. How many penguins live in this
colony?**

**A.1288. Five baby penguins eat as much as two adult penguins. How much fish do five adult penguins eat in a week, if 8 babies eat 320 dkg of fish daily? (100 dkg = 1 kg)**

**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 A from India**