VIOLYMPIC TOAN TIENG ANH Vong 1 8

<span class='text_page_counter'>(1)</span>Vòng 1 1. If then = 11 2:The average of 5, 7, 9, 11, 13 is 9 3: Write > ; = ; < = 4:If = 121 then = 322 5: Find the value of k if The result: k = 7 6: If and then = 108 7: If A is more than then A = 76 8: Write the missing number: - 2416649 = 9: It took boys hours to clean a house. How many boys are needed to clean the house in hours? The result is: 9 - 3 = 6 boys. 10:Three years ago, Nora was half as old as Mary is now. If Mary is four years older than Nora then Mary is 14 years old now. Vòng 2 1:Calculate: = 13 2:Type the missing number:95 ; 97 ; 99 ; 101 ; 103 3: If N - 25 = 116 then N = 141 4: Fill in the blank with > ; < ; = < 5.If then =. . . 25. . . 6: The sum of two consecutive numbers is .The greater number is . .75 . . 7:If ; and the average of is then =. . . 18. . . 8: Fill in the blank with > ; = ; < 2 hours 30 minutes < 230 minutes 9: 6 workers take 2 hours to collect eggs. If 2 workers are sick, the other workers need 3 hours to collect the eggs. 10:Fin the greatest 4-digit-number which is divisible by both 4 and 7. The result is 9996 Vòng 3 1:The average of , and is 5 2:Calculate:3 x 3 + 8 : 4 = 11 3: If = then = 57 4: Subtract: = 3000 5: If is divisible by , then the remainder of is 0 6: How many minutes are there in a day ( hours)? There are 1440 minutes. 7: If then = 32 8: Ed earns dollars / hours. He will earn 160 dollars in hours. 9: If then = 1 10: It rained five days in June. How many days did it not rain in this month? The result is 25 days. Vòng 4 1:If the average of A and 6 is 10 then A = 14 2: Write the number: The result is: 5907 3: The average of 21 and 23 is 22 4: If then = 79 5: The sum of 25 and x is the smallest 3-digit-number. x = 3 6:There are 7 even numbers from 1 to 15. 7:If ; ; then = 20 8: Minh is 9 years old. If the average of Minh and his mother is 22, then his mother is 35 years old. 9: N is a 2-digit number. If N + 5 < 20 and N + 5 is divisible by 9 then N = 13 10:Minh and Nam have a total of 9 pencils. If Minh has 4 pencils more than Khoa, then Nam and Khoa have a total of 5 pencils Vòng 5 1:Fill in the blank:2 hours 2 minutes = 122 minutes 2:Caculate: = 3:Write as numerals: Nine thousand eight hundred and three The result is 5803 4: Find if The result is 700 5: If a square has one side's length = 9 cm then its perimeter is 36 cm. 6: If and then =0 7: If this fraction expresses the colorless parts of the circle, then x = 6. 8:Find the smallest number in the sequence: 5067, 5760, 6705, 5076 The result is 5067 9: Calculate: 2002 x 2005 - 2002 - 2004 x 2001 = 2004 10:If half of the product of 8 and 9 is three times of N then N = 12 Vòng 6 1:Fill > , < , =:12 + 13 + 14 < 40 2: The sum of 115 and 541 is 656.

<span class='text_page_counter'>(2)</span> 3: If N = 103 then (N + 22) + N = 12 4:1500 cm = 15 m 5: If a = 12 ; b = 15 and c = 39 then the average of a, b, c is 22 6:The product of 25 and 12 has 3 digits. 7: 15 kg + 1307 g = 16307 g 8: If 25 < A < 28 and A is divisible by 13 then A = 26 9:If A + B + C = 17 and A + B - C = 7 then the average of A and B is 6 10:Nam spent 25 dollars to buy 3 pens and 5 pencils. If 1 pen costs 5 dollars then 1 pencil costs 2 dollars. 11. 209 3 44 18. 1170. 27. Vong 7 1:Fill in the blank with <, >, =: 1006 g 3:The area of a rectangle is 4:Calculate: 25 × 148 =. <. 1.06 kg 2:Convert: 2km 8m =. and its width is 5 cm.Its length is. 4700. 9. 6:It takes 4 oranges to make a cup of juice. If Minh has 112 oranges, he can make. 8:Calculate: 485 : 5 + 783 : 9 =. 516. 9:If 2010 < p × 3 < 2014 then p = VÒNG 8. 5:If. of Mom’s salary is $23, then her salary is. , 16, 32. 3:Fill in the blank: 1968 × 2054 = 2054 × 4:If a, b are natural numbers and 999 < a < b < 1002 then the sum of a and b is 6:Calculate: (1 + 3 + 3 + 7 + ........+ 97 + 99) × (45 x 3 - 45 x 2 - 45) = -x=. 8:Calculate:. then x = +. +. =. 16 times of 231 cup(s) of juice. 150. cm. 50. 504. 671. 1:Type the missing number in this sequence: 1, 2, 4,. 7:If. 28. 9: The average of all the numbers from 1 to 99 is. 10:If the average of three consecutive numbers is 8 then their product is 1:Calculate: 10290 : 30 + 173 =. =. and the length is 45 cm then the perimeter of that rectangle is 184. m. cm. 5:Fill in the blank with <, >, =: 231 times of 16. 7:If the rectangle area is 1350. 2008. 2300. dollars.

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