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olimpiade+matematika+smp

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									1.   A rectangle and a semicircle are drawn as
     follows,so that AB = 4 and AC = 1.
     Find BD.

      A.   17
      B.   15
      C.   √17
      D.   √15
      E.   None of these
The figure shown is constructed of 6 squares each having
       side length 1. What is the area of the
      shaded portion?

      (A) 3 (B) 2√3 (C) 4 (D) 3√2 (E) 4,5
3. George washes a car in 30 minutes and
   Marie washes the same car in 45 minutes.
   How many minutes will it take both working
   together to was the car?
   A. 25
   B. 20
   C. 37,5
   D. 15
   E. 18
4. How many zeros appear at the end of the product
    1 × 2 × 3 × 4 ×… × 50 ?
(A) 5
(B) 10
(C) 12
(D) 13
(E) None of these
5.   I “let my fingers do the walking” when I dial my phone,
     which has the following arrangement of keys:

               123
               456
               789

     If the distance from 1 to 2 or from 1 to 4 is 1 unit, then how
     many units do my fingers “walk” when I dial my
     phone number 654-9873?

        A. 3+2√2 +5
        B. 3+3√2 +5
        C. 4+2√2 +5
        D. 3+√2+2√5
        E. 4+√2+2√5
6. Diketahui
3a=4, 4b=5, 5c=6, 6d=7, 7e=8, dan 8f=9.
Maka nilai abcdef adalah…
A. 1
B. 2
C. √6
D. 3
E. 10/3

								
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