math comp - junior ind

8/7/2019 Math Comp - Junior Ind

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2011 Bali Math Competition

Junior Division

Individual Round



Question 2

30% of watermelons are yellow. 70% of bananas are

yellow. If there are 80 watermelons and 100

bananas, how many yellow fruits are there?

A) 94

B) 98

C) 102

D) 106

E) 110



Question 3

Saras house is in a blackout. She wants to take outsocks randomly from the drawer. If the colors of socks are red, yellow, green, and blue, how manysocks does she need to draw out to make sureshe has one pair of same color?

A) 2

B) 3

C) 4D) 5

E) 6



Question 4

Sam owns some zebras and ducks. He counted thenumber of total legs of the animals he owns,which turned out to be 28. If the total number of

animals is 10, how many ducks does Sam have?A) 5

B) 6

C) 7

D) 8

E) 9



Question 5

Find the next number in the sequence

1, 1, 2, 3, 5, 8, ______A) 9

B) 10

C) 11D) 12

E) 13



Question 6

Sophia is planting trees every 5 meters. If she

planted along a wall which is 100 meters long,

how many trees did she plant in total?

A) 20

B) 21

C) 22D) 23

E) 24



Question 8

Find the sum.

1+2+3+4+5+6+7+8+...+97+98+99+100

A) 4950

B) 5050

C) 5150

D) 5250

E) 5350



Question 9

A triangle has sides with length 8cm and 2cm.

Which of below CANT be length of the other

side?

A) 7cm

B) 8cm

C) 9cmD) 10cm

E) 11cm



Question 10

Adam is shorter than Daniel and Chris. Chris is not

the tallest and Eric is not the shortest. If Bob is

shorter than Eric who is the shortest one?

A) Adam

B) Bob

C) Chris

D) Daniel

E) Eric



Question 11

How many squares are there?

A) 16B) 26

C) 30

D) 36

E) 51



Question 12

Adam and Bobs average income is $300 per month.

If Chriss average income is $600 per month, what

is Adam, Bob, and Chriss average income?

A) $300

B) $350

C) $400

D) $450

E) $500



Question 13

Adam has a son called Bob. Adams age was twice

of Bobs five years ago. If the sum of their age

right now is 70, how old is Adam now?

A) 30

B) 35

C) 40

D) 45

E) 50



Question 14



Question 17

A sloth is climbing a tree. He climbs 80cm duringthe day and he slips down 30cm back during thenight. If he started climbing a 8m tall tree, by

when would he have reached the top?A) 15th day at midnight

B) 15th day at noon

C) 16th day at midnight

D) 16th day at noon

E) 17th day at midnight



Question 20

Tom is writing numbers from 1 1000. How

many 3s will he write?

A) 297B) 298

C) 299

D) 300E) 301

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