Tutor MathsGuru: Ask me for your burning Maths questions!

[zyberk]

Hi,


Appreciate if you can help with this question:

A snail is climbing up a wall 20m high. Everyday it climbs up 5m, and slips down 2m at night. How many days will it take the snail to reach the top of the wall?

Thanks.

[Maths Monster]

delete

[zyberk]

Maths Monster:

Day 1 = 5 - 2 = 3m
Day 2 = 3 + 5 - 2 = 6m
Day 3 = 6 + 5 - 2 = 9m
Day 3 = 9 + 5 - 2 = 12m
Day 4 = 12 + 5 - 2 = 15m
Day 5 = 15 + 5 = 20m

It reached 20m on Day 5 before slipping at night.

Thanks. But i think you had a typo-error here.

You had repeated Day3 twice. So I guess the right answer should be 6 days, right?

Thanks again. :celebrate:

[Maths Monster]

delete

[Maths Monster]

delete

[zyberk]

Maths Monster:

Yes I have. Thanks for spotting my mistakes.

Day 1 = 5 - 2 = 3m
Day 2 = 3 + 5 - 2 = 6m
Day 3 = 6 + 5 - 2 = 9m
Day 4 = 9 + 5 - 2 = 12m
Day 5 = 12 + 5 - 2 = 15m
Day 6 = 15 + 5 = 20m

Thanks. That is the same answer my DD got. But her teacher insist that the answer is 7 days !

:x :x

[talk_aboutstudies]

Maths Monster:

talk_aboutstudies:

Is there a method where i can solve all speed questions like this:


A car and a van were travelling in opposite directions at speeds of 80km/h and 60km/h respectively. The car was travelling from Town A to Town B while the Van was travelling form Town B to Town A. At what time would the pass each other?


Note: No distance is given

Please help!

Time = Distance / (80 + 60) = Distance / 140

This is the same as assuming car speed is 140km/h and the time taken to travel from town A to B.

thanks!

[talk_aboutstudies]

Maths Monster:

talk_aboutstudies:

Is there a method where i can solve all speed questions like this:


A car and a van were travelling in opposite directions at speeds of 80km/h and 60km/h respectively. The car was travelling from Town A to Town B while the Van was travelling form Town B to Town A. At what time would the pass each other?


Note: No distance is given

Please help!

Time = Distance / (80 + 60) = Distance / 140

This is the same as assuming car speed is 140km/h and the time taken to travel from town A to B.

thanks!

[Herbie]

Dear All.

I have one qn below:

Fig 1 = 1 no. of cubes
Fig 2 = 4 no. of cubes
Fig 3 = 10 no. of cubes

How to create the formula to get the no. of cubes for fig 6?

Which figure will have 120 cubes?

Thanks!

[zyberk]

Herbie:

Dear All.

I have one qn below:

Fig 1 = 1 no. of cubes
Fig 2 = 4 no. of cubes
Fig 3 = 10 no. of cubes

How to create the formula to get the no. of cubes for fig 6?

Which figure will have 120 cubes?

Thanks!