Hop on, hop off

Algebra Level 1

A bus started off at the interchange with 40 passengers. At the first stop, half of the passengers got off and then 10 passengers got on. At the second stop, half of the passengers got off and then 10 got on. After the second stop, how many passengers are there on the bus?


The answer is 25.

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Arron Kau by Arron Kau

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12 solutions

DAdhie Mu
Nov 11, 2013

1st stop > 40/2=20 ; 20+10=30 2nd stop > 30/2=15 ; 15+10=25

4 Helpful 0 Interesting 0 Brilliant 0 Confused
Ananda Part Ii
Nov 12, 2013

There are 40 passengers in the bus

It said at the first stop, half of it got off and the 10 passengers got on, so there will still 30 passengers in the bus

Then at the second stop, half of 30 passengers got off and after it, 10 got on, so there will be 25 passengers in the bus

According to the question, the answer is 25

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Charlton Teo
Nov 11, 2013

After first station, 40/2+10=30 passengers left After second station, 30/2+10=25 passengers left

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Hi Charlton

Victor Loh - 7 years, 7 months ago
Sin Joey
Nov 11, 2013

Start=40 passengers.

First stop (half of the passengers got off and then 10 passengers got on) that means 40 divide by 2 plus 10 =30.

Second stop(half of the passengers got off and then 10 passengers got on) that means 30 divided by 2 plus 10=25

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Johmel David
Nov 10, 2013

40-20=20+10=30-15=15+10=25

1 Helpful 0 Interesting 0 Brilliant 0 Confused

can you please use proper mathematical law, i don't understand that solution

Muhammad Syafiq - 7 years, 7 months ago
Darius Ong
Nov 10, 2013

is 25.

1 Helpful 0 Interesting 0 Brilliant 0 Confused

After 1st stop: #40-20+10=30

After 2nd stop: #30-15+10=25

therefore, the answer is 25

Prasad Durga - 7 years, 7 months ago

25

Ruhul Art - 7 years, 7 months ago

Can you write what you mean?

Calvin Lin Staff - 7 years, 7 months ago
Tootie Frootie
Feb 21, 2014

as 40/2 + 10 = 30 on first stop and 30/2 + 10=25 on bus

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Navneet Gautam
Nov 13, 2013

40 - (40/2) = 40 -20 = 20 Then... 20 + 10 = 30 Next... 30 - (30/2) = 30-15 =15 Then... 15 + 10 = 25

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Grant Evangelista
Nov 12, 2013

40-20=20 --> 20+10=30 --> 30-15=15 --> 15+10=25

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Mostafa Hamdy
Nov 11, 2013
  • 40/2=20
  • 20+10=30
  • 30/2=15
  • 15+10=25
0 Helpful 0 Interesting 0 Brilliant 0 Confused
Cham Han
Nov 11, 2013

(40/2) + 10 =30 (30/2) + 10 =25

0 Helpful 0 Interesting 0 Brilliant 0 Confused

Can you use words to explain what you mean?

Calvin Lin Staff - 7 years, 7 months ago
Sagar Bhatia
Nov 11, 2013

After 1st stop: #40-20+10=30

After 2nd stop: #30-15+10=25

therefore, the answer is 25

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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