₦airaland Forum

Happy New Month Nairalanders!
So, here is an IQ test to begin the new month. Let's see who will get the answer?

59

40 na

It should be 60

1 + 5(1) = 6

2 + 6(2) = 14

3 + 7(3) = 24

5 + 11(5) = 60

60

If you want I can show working.
The correct answer is 60

24 + 5 + 11 = 40

Assuming each expression is independent of the preceding expressions, the general rule is a + b = a * (b+1). Hence, 5 + 11 = 5 * (11+1) = 60.

Conversely, if an expression depends on the one immediately preceding it, then the answer by @snowball11 is also correct. The general rule in this case is c(n) = a+b = c(n-1)+a+b, so c(4) = 5+11 = c(3)+5+11 = 24+5+11 = 40.

(edit)
It turns out there is another possible answer (see @Panda7's post below). The structure of each expression is c(n) = a(n+2) + b(n+2), where a(n+2) is the (n+2)th Fibonacci number, and b(n+2) is the (n+2)th arithmetic integer. The Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, .... [1], while the arithmetic integer sequence is 1, 3, 5, 6, 7, 11, 13, 14, 15, 17, 19, 20, 21, 22,... [2]. The general rule is c(n) = a(n+2) + b(n+2) = a(n+2) + n*b(n+2). Hence, c(4) = a(6)+b(6) = 5+4*11 = 49.
This last approach, inspired by @Panda7's answer, perhaps overcomplicates the solution, but it explicitly shows how the terms of the expressions are constructed. It is more general and mathematically sound than the other two approaches already listed. In fact, one may construct subsequent expressions independent of preceding expressions, for example, the next expression is c(5) = 8 + 13.

References:
[1] https://en.m.wikipedia.org/wiki/Fibonacci_sequence
[2] https://en.m.wikipedia.org/wiki/Arithmetic_number

If you like solve from now till tomorrow, if your answer is not 40, go back and have a talk with your mathematics teacher.

Amotolongbo:
It should be 60

1 + 5(1) = 6

2 + 6(2) = 14

3 + 7(3) = 24

5 + 11(5) = 60

Amotolongbo:
It should be 60

1 + 5(1) = 6

2 + 6(2) = 14

3 + 7(3) = 24

5 + 11(5) = 60

Defending nonsense lol 😂

1+5(1)=6
2+6(2)=14
3+7(3)=24
5+11(5)=60(ans).

38
Make nobody stress me

NowisGod109:
38 Make nobody stress me

40

Why will anyone one want to be solving math on nairaland

1 + 5(1) = 6
2 + 6(2)=14
3 + 7(3)=24
5 + 11(4) = 49


simple series or quantitative reasoning

Solving this maths can't add no dough to my pot

49

Interesting

60

coputa:
49

How

Popesuccess:
40

How

Amotolongbo:
It should be 60

1 + 5(1) = 6

2 + 6(2) = 14

3 + 7(3) = 24

5 + 11(5) = 60

✅

Federal Polytechnic Ayede Ogbomoso Oyo State.
Admission in Progress

Saviourk:
Happy New Month Nairalanders!
So, here is an IQ test to begin the new month. Let's see who will get the answer?

1+5+0=6
2+6+6=14
3+7+14=24
5+11+44=60

rillchritty:
Assuming each expression is independent of the preceding expressions, the general rule is a + b = a * (b+1). Hence, 5 + 11 = 5 * (11+1) = 60.

Conversely, if an expression depends on the one immediately preceding it, then the answer by snowball11 is also correct. The general rule in this case is c(n) = a+b = c(n-1)+a+b, so c(4) = 5+11 = c(3)+5+11 = 24+5+11 = 40.

dis one no concern quadratic equation na just small reasoning

Verbtips:
dis one no concern quadratic equation na just small reasoning

Of course, the exercise is not intended to test mathematical prowess. However, ability to understand the different possible patterns in which valid answers could be constructed is a good 'small reasoning' skill. After all, innovative solutions to real-world problems are sometimes inspired by trivial questions like this one.

rillchritty:
Of course, the exercise is not intended to test mathematical prowess. However, ability to understand the different possible patterns in which valid answers could be constructed is a good 'small reasoning' skill. After all, innovative solutions to real-world problems are sometimes inspired by trivial questions like this one.

on point
good one see this
logic question
oasis is to desert,
..........is to ocean

Verbtips:
on point
good one see this
logic question
oasis is to desert,
..........is to ocean

Island, perhaps?
The former is surrounded by the latter.

rillchritty:
Island, perhaps? The former is surrounded by the latter.

correct this is the formular i used for this maths A+B+B(A-1)=ANS

Baba duh vex... Kukuma paste everything for here

rillchritty:
Assuming each expression is independent of the preceding expressions, the general rule is a + b = a * (b+1). Hence, 5 + 11 = 5 * (11+1) = 60.

Conversely, if an expression depends on the one immediately preceding it, then the answer by @snowball11 is also correct. The general rule in this case is c(n) = a+b = c(n-1)+a+b, so c(4) = 5+11 = c(3)+5+11 = 24+5+11 = 40.

(edit)
It turns out there is another possible answer (see @Panda7's post below). The structure of each expression is c(n) = a(n+2) + b(n+2), where a(n+2) is the (n+2)th Fibonacci number, and b(n+2) is the (n+2)th arithmetic integer. The Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, .... [1], while the arithmetic integer sequence is 1, 3, 5, 6, 7, 11, 13, 14, 15, 17, 19, 20, 21, 22,... [2]. The general rule is c(n) = a(n+2) + b(n+2) = a(n+2) + n*b(n+2). Hence, c(4) = a(6)+b(6) = 5+4*11 = 49.
This last approach, inspired by @Panda7's answer, perhaps overcomplicates the solution, but it explicitly shows how the terms of the expressions are constructed. It is more general and mathematically sound than the other two approaches already listed. In fact, one may construct subsequent expressions independent of preceding expressions, for example, the next expression is c(5) = 8 + 13.

References:
[1] https://en.m.wikipedia.org/wiki/Fibonacci_sequence
[2] https://en.m.wikipedia.org/wiki/Arithmetic_number

See genuses


Given that....

1 + 5 = 6

2 + 6 = 14

3 + 7 = 24

Now...
5+11+24= 40


The answer is 40.

40

60 is the answer

Amotolongbo:
It should be 60

1 + 5(1) = 6

2 + 6(2) = 14

3 + 7(3) = 24

5 + 11(5) = 60

Simple..