1, 2, 3, 5, (?)
multi choice ans:
a, 13
b, 8
c, 10
d, 7
explain ans. pls cheers
2006-11-07 11:57:18 · 16 answers · asked by lONDON_kiD 1 in Science & Mathematics ➔ Mathematics
Its a bad question, but the answer they're probably looking for is 8.
Its not prime numbers as some have suggested, because 1 isn't a prime number. (Prime numbers are 2,3,5,7,11 etc)
It looks like its supposed to be the Fibonacci series, but they've missed off the first 1
The Fibonacci series is 1, 1, 2, 3, 5, 8, 13, 21 etc
2006-11-07 12:15:47 · answer #1 · answered by mainwoolly 6 · 1⤊ 0⤋
The answer is b.8, because the next number in the sequence is the sum of the two before it. 10 and 13 don't have any correlation with this sequence. Some people may say 7 as it would appear to be a sequence of prime numbers, but 1 IS NOT a prime number. The definition of a prime number is that it is only divisible by itself and 1 to form a whole number i.e. has two factors. The number 1 only has one, so is separate from this number set.
2006-11-07 23:39:22 · answer #2 · answered by Anonymous · 1⤊ 0⤋
it's b 8
1+2 =3
2+3=5
3+5=8
2006-11-07 12:01:55 · answer #3 · answered by Sarah S 3 · 1⤊ 0⤋
The answer is 8.
Each term of the series is the sum of the two before it.
1+2 = 3
2+3 = 5
3+5 = 8
2006-11-07 15:51:22 · answer #4 · answered by martina_ie 3 · 0⤊ 0⤋
8 13 21 34
2006-11-07 20:33:37 · answer #5 · answered by Sluugy 5 · 1⤊ 0⤋
b. 8
1+2 =3
2+3=5
5+3 = 8
2006-11-07 11:59:10 · answer #6 · answered by Latina129 2 · 1⤊ 0⤋
b,8 ....1+2=3 2+3=5 therefore the next in sequence is 3+5 = 8.
QED
2006-11-07 12:07:21 · answer #7 · answered by JAKE 2 · 1⤊ 0⤋
B. Each number is the sum of the previous 2 numbers.
2006-11-09 05:51:59 · answer #8 · answered by cheaper_bills 3 · 0⤊ 0⤋
d) 7 series of prime numbers
or
b) 8 Fibonacci numbers
2006-11-07 11:59:58 · answer #9 · answered by Anonymous · 0⤊ 1⤋
7, the series is prime numbers
2006-11-10 09:35:40 · answer #10 · answered by Darth Emiras 2 · 0⤊ 0⤋