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Math Quiz Bee - Paper

Math Quiz Bee

2009 METROBANK-MTAP-DEPED MATH CHALLENGE NATIONAL FINALS
GRADE 6 TEAM ORAL

Part 1: 15 seconds (11 items)

1. Manila time is 4 hours ahead of Dubai time. A trip from Manila to Dubai, takes nine hours. What time will you arrive in Dubai if you leave Manila at 8:00 P.M.?

Solution
8:00 P.M. + 9 hours is 5:00 A.M.
5:00 A.M. - 4 hours is 1:00 A.M.
Answer: 1:00 A.M.

2. How many digits are there in the number N = 210 x 58?

Solution
210 x 58 = (2 x 5)8 x 22 = 108 x 4 = 100 000 000 x 4 = 4 000 000 000
Answer: 9

3. The faces of a big cube are painted. Then the cube is cut into 125 unit cubes. How many of the unit cubes have exactly two painted faces ...

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by 20 so that the product is a perfect cube is 2 x 52 which is equal to 50.
Answer: 50

5. On a quiz show, each question is worth four times as much as the previous question. The fourth question is worth P1,600. How much was the first question worth?

Solution
1600 [pic] 4 [pic] 4 [pic] 4 = 25
Answer: P25

6. In 3 ___ 6 ___ (-9), what two different basic operations can you place in the ___ that will result to the least answer?

Solution
The bigger the absolute value of a negative number, the smaller is the negative number. So x (for multiplication) should be placed before -9.
÷ (for division) cannot be placed after 3 because it will be performed first and performing division then multiplication will not result to the least answer.
- (for subtraction) cannot be placed after 3 also because 3 - 6 is -3 which when multiplied by -9 gives a positive answer,
Therefore, + (for addition) should be placed after 3. So, 3 + 6 x (-9) = -51
Answers: +, x (order ...

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PAPER DETAILS

Added: 9/22/2013 04:23:50 PM
Submitted By: mmchavez1089
Category: Education
Type: Free Paper
Words: 1178
Pages: 5

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