Mathematical challenge

last SG · 2009-05-07T23:34:43+00:00

My answers1. 11^11, dun anyhow cock 11!^11! ( i never say can use !) or infinite2. One pound of feathers...... You never say cannot use ! also

Maxpac SG

This is a mathematical challenge, and it's been said
that:

If you're an engineer (or history major) , you should be able to solve
it in (under) three minutes, if you're an architect, in three hours;
if you're a doctor, in six hours; if you're an accountant, in three
months and if you're a lawyer, probably never.

If you're good at math or logical problems, solve this challenge and
the answer is the password to open the spreadsheet to which you can
add your name to the hall of fame.

What is the missing number in this logical series?
1, 2, 6, 42, 1806, ____???

Anyone Knows?

Rednano SG

3263442

1806 x 1807

HyuugaNeji SG

Its pretty easy.

What hall of fame are you talking about?

HyuugaNeji SG

When numbers get too big so fast, you use power or factoral.

When numbers get big relatively fast, you use multiply.

If not, use addition

For this question, you use k x k + k where k is the previous term

Some people know 45 x 45 = 2025 or even 42 x 42 = 1764 by heart.

Darkness_hacker99 SG

I am in the Science stream. And I came to my solution in less than 3min.

x * (x +1).

say starting with 1 and let x be the number before the unknown number that you're finding.

2nd in series will be:
1 * ( 1+1) = 1 *2 = 2

3rd in series will be
2 * (2 +1) = 2 * 3 = 6

4th in series will be
6 * (6 +1) = 6 * 7 = 42

5th in series will be
42 * (42 + 1) = 42 * 43 = 1806

6th in series wil be
1806 * (1806 + 1) = 1806 * 1807 = 3263442

HyuugaNeji SG

I am in the Science stream. And I came to my solution in less than 3min.

x * (x +1).

say starting with 1 and let x be the number before the unknown number that you're finding.

2nd in series will be:
1 * ( 1+1) = 1 *2 = 2

3rd in series will be
2 * (2 +1) = 2 * 3 = 6

4th in series will be
6 * (6 +1) = 6 * 7 = 42

5th in series will be
42 * (42 + 1) = 42 * 43 = 1806

6th in series wil be
1806 * (1806 + 1) = 1806 * 1807 = 3263442

JC boy?

omgukilledkenny SG

Yep I'm with 3263442.

Lee012lee SG

Aiyah, why take the mathematical challenge so serious lor

What TS claims has no ground lah.

What hall of fame ? Play online games huh ?

The question is really so difficult meh ?

Darkness_hacker99 SG

JC boy?

I'm a Biomedical Sciences dude.

mystiv SG

more challenging puzzles, anyone?

candiz SG

too easy

ItchyArmpit SG

I am in the Science stream. And I came to my solution in less than 3min.

x * (x +1).

say starting with 1 and let x be the number before the unknown number that you're finding.

2nd in series will be:
1 * ( 1+1) = 1 *2 = 2

3rd in series will be
2 * (2 +1) = 2 * 3 = 6

4th in series will be
6 * (6 +1) = 6 * 7 = 42

5th in series will be
42 * (42 + 1) = 42 * 43 = 1806

6th in series wil be
1806 * (1806 + 1) = 1806 * 1807 = 3263442

hihi!

Chin Eng SG

i am nobody, i took more time to look for the calculator in Windows than trying to understand the logic of the sequence, which really is quite easy.... because i tutor my sons when they were in primary school.

greengoblin SG

more challenging puzzles, anyone?

Prove or disprove that 111...111 (n times) where n is a positive integer > 1 has an even number of positive divisors.

dinky1409 SG

i am stupid i cant solve it i want to die.. Waaaaahhhhhhhhhhh~

dinky1409 SG

oh for the record, i took less than 1 second. cos i just have look down at rednano's answer and i'll get the answer lawls.

SBS n SMRT SG

some other questions...pretty easy

1. What is the largest number you can made by 4 "1"s.

2. which is heavier, one pound of feathers or a pound of gold

jayh272416 SG

some other questions...pretty easy

1. What is the largest number you can made by 4 "1"s.

2. which is heavier, one pound of feathers or a pound of gold

11^11?

they weigh the same

HyuugaNeji SG

1111!?

skythewood SG

11 power 11.