Math Olympiad K1_04 on Day:.........Month:..........Year:...........

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Question 1: A study lamp in a room was initially off. When Sing entered, she pressed the lamp's switch 23 times. At the instant is the lamp switched on or off ?

Question 2: In 5 years' time, Sing will be 25 years old. How old is Sing now ?

Question 3: A study lamp in a room was initially on. When Usa entered, she pressed the lamp's switch 20 times. At the instant is the lamp switched on or off ?

Question 4: A study lamp in a room was initially off. When Usa entered, she pressed the lamp's switch 30 times. At the instant is the lamp switched on or off ?

Question 5: Ann has 20 cookies while Deo has half as many cookies as Ann. How many cookies do they have together ?

Question 6: Ann has 40 cookies while Deo has half as many cookies as Ann. How many cookies do they have together ?

Question 7: A study lamp in a room was initially on. When Tong entered, she pressed the lamp's switch 23 times. At the instant is the lamp switched on or off ?

Question 8: Tong has 60 cookies while Thy has half as many cookies as Ann. How many cookies do they have together ?

Question 9: A study lamp in a room was initially off. When Tong entered, she pressed the lamp's switch 41 times. At the instant is the lamp switched on or off ?

Question 10: Lika has 40 cookies while Linich has half as many cookies as Ann. How many cookies do they have together ?