International Junior Math Olympiad Grade2_06 on Day:.........Month:..........Year:...........

Total Core =

Question 1: In the grid shown below, how many more squares must be shadded so that exactly 1/2 of the grid is left unshaded ?

Question 2: Using the digits 1, 2, and 3, how many two-digit numbers can you form, if each digit can only be used once in a number ?

Question 3: In Primary 2 class, each student collects either stamps or coins, or both. Eleven students collect stamps, 13 collect coins, and 4 collect both. How many students are in the class ?

Question 4: Mongkut has the stamps as shown below. How many different pastage amounts can he form using one or more of these stamps ?

Question 5: Ertha and her friends Anira, Bercha, Caritha, and Demri are to be seated in a row such that Anira stays at the middle and Ertha sits next to her right. In how many ways can they be seated ?

Question 6: Kasem has 4 fruits: mango, durian, dragon fruit and banana. How many fruit sets can he make with durian and any two other fruits?

Question 7: Dao cuts a baguette into 3 pieces in 6 seconds. How many seconds will it take her to cut 3 gaguettes into 2 pieces each ?

Question 8: Hansa and Kalaya are sisters. They have the same number of ribbons. When Hansa gave 6 of her ribbons to Kalaya, Kalaya had 24 ribbons althegether. How many ribbons were left to Hansa ?

Question 9: Art, Ben, Cid, Don, and Elm raced from school to the park. Art made to the park before Don. Ben arrived behind Cid but ahead of Art. Elm was not the last arrive. Who among the boys made to the park first?

Question 10: Before losing a coin, Jaidee has 2 coins of each of the follwing Thai currency denominations: 1 satang, 5 satang, 10 satang, 25 satang, 50 satang, ฿ 1, ฿ 2, ฿ 5. She said her total money now amounts only to ฿ 15.82.
Help her find which of the coins was lost. (Hint ฿ 1 = 100 satang)
A. 50 satang
B. ฿ 1
C. ฿ 2
D. ฿ 5