Can you please explain me these two questions too.

[Lubna]

The wheel of Fran's bicycle has a circumference of150 cm.

How many complete revolutions must the wheel make for Fran to travel 1.5 km?

The answer is 1000.

2). Look at this number machine.

N--- divide by 4 ---- plus 1 ----- multiple by 2 ---?


Nilesh started with the number N. which of these is the number that Nilesh ended up with ?


A) N/8 + 2
B) N/4 +2
C) N/2 +2
D) N/4 +1
C) N/2 +1

The answer is C

[Guest55]

A wheel rotates on its circumference [outer edge] - so how far forward will it go in one turn?

Number machine: Go through each step in turn - it can help to use a real number first.

N ... divide by 4 = N/4 ..... add 1 = (N/4) + 1 .... multiply by 2 = [can you see why c is the answer now?]

[Surferfish]

1. In one revolution of the wheel the bike travels the distance of the circumference.

So just divide the total distance by the circumference making sure you use the same units. (probably easiest to convert both to metres)

2. Just do what it says.
Machine is sequential so ignore BODMAS

(N / 4 + 1) * 2

(cross post with G55)

[Lubna]

Can you please explain me little bit more please I don't understand what to do thanks

[Guest55]

Which question?

[Lubna]

The two questions above please

[Guest55]

I'm not sure how much clearer we can be.

The wheel travels 150 cm each time it turns.

So it goes 150cm, 300cm, 450cm ... as it turns once, twice, three times, etc so you need to find how many times 150cm goes into the distance given.

The second:

double [(N/4) + 1] = 2N/4 + 2 = N/2 + 2

[Lubna]

THAnks

[Lubna]

Thanks

[Kingfisher]

Hello Lubna. I think that maybe you should ask a tutor to help out with your child's 11+ preparation if you are struggling so much. The questions have not been difficult and I suspect there will be more complicated questions on the paper. Which schools are you considering?