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# Countdown with sNarah

• 27-04-2013 12:14am
Registered Users Posts: 4,570 ✭✭✭

In driving from town A to town D you pass through town B and then through town C. It is 10 km farther from town A to B than from town B to C and 10 km farther from B to C than from C to D. How far is it from town A to town B?

«1

• Registered Users Posts: 4,570 ✭✭✭

In the following decimal, how many 2’s are there in all before the hundredth 3?

0.23223222322223……

• Registered Users Posts: 4,570 ✭✭✭

In the figure below the sum of the numbers on each line are the same. Find x and y.

• Registered Users Posts: 4,570 ✭✭✭

Hilary is having a party. The first time that the doorbell rings, 1 guest enters. The second time 3 guests enter. Thereafter on each successive ring, a group that has 2 more persons than the group that had entered on the previous ring. How many guests in all will have arrived after the twentieth ring?
Ring number
Number who enter
Total number
1
1
1
2
3 4 3
5 9 …

20

• Registered Users Posts: 4,570 ✭✭✭

A mathematician states that if one folds a piece of paper in half, and folds it in half again and continues to do this 43 times, the height of the stack of folded paper will be greater than the distance between the earth and the moon. Can you prove it by simple calculation?
* Notes
1. This a theoretical question, it would be impossible to physically fold a piece of paper in half and in half again, and so on until you 43 times.
2. The distance between the earth and the moon is 385 000 km and the thickness of paper is 0.006cm.)

Number of folds 1 2 3 4 5 ... ... 42 43 Number of pieces of paper 2

• Registered Users Posts: 4,570 ✭✭✭

A target for archery is designed with 4 different regions of the same area and each circle has the same centre as shown in the figure below. If the radius of the red region is 10cm, find the width of each region correct to one decimal place.

• Registered Users Posts: 4,570 ✭✭✭

The following figure shows the dimensions of a lift. What is the longest possible length of a stick that can be put inside the lift? (Give your answer to the nearest cm). You must show or explain how you found your solution to the answer in the box below.

• Closed Accounts Posts: 31,967 ✭✭✭✭

You're my favourite.

• Registered Users Posts: 30,123 ✭✭✭✭

That's NumberWang!

• Closed Accounts Posts: 31,967 ✭✭✭✭

• Registered Users Posts: 4,570 ✭✭✭

• Registered Users Posts: 2,641 ✭✭✭

This thread gives me a negative erection ..

• Closed Accounts Posts: 31,967 ✭✭✭✭

• Registered Users Posts: 4,570 ✭✭✭

• Closed Accounts Posts: 31,967 ✭✭✭✭

He can count it if it makes anyone feel better. ^_^

• Registered Users Posts: 4,570 ✭✭✭

16

• Closed Accounts Posts: 31,967 ✭✭✭✭

ಠ_ಠ

• Registered Users Posts: 12,748 ✭✭✭✭

14

Am I doing it right?

• Registered Users Posts: 4,570 ✭✭✭

Needs 4 more I reckon

• Registered Users Posts: 12,748 ✭✭✭✭

18

Gotcha, thanks.

• Registered Users Posts: 4,570 ✭✭✭

Excellent. Good job. *Pets CoderDozer on the shoulder*

Now substract 17, square it, double it, add 42 and apply the co-sinus.
What do you get?

• Registered Users Posts: 30,123 ✭✭✭✭

Numberwang!

• Registered Users Posts: 4,570 ✭✭✭

numbertwoo!

• Closed Accounts Posts: 43

sNarah wrote: »
Excellent. Good job. *Pets CoderDozer on the shoulder*

heh, tone down the touching please

• Registered Users Posts: 4,570 ✭✭✭

But but but, we are in FlirTar! Touching is mandatory!

NO TOUCHING WILL RESULT IN A BAN

• Registered Users Posts: 30,123 ✭✭✭✭

• Registered Users Posts: 4,570 ✭✭✭

Oh thanks Damo ♥
(I choose to interpret this message as being for me and me alone)

• Closed Accounts Posts: 31,967 ✭✭✭✭

I encourage this interpretation on the basis that I think Damo smells funny.

• Registered Users Posts: 30,123 ✭✭✭✭

You think right.
I smear myself with napalm nightly because I like how it makes my skin tingle.

• Registered Users Posts: 4,570 ✭✭✭

You can come and tingle me!