13, it's the only prime. All the other ones can be divided by something other than 1.
The two number have no common prime factors. i.e. the HCF(14, 15) = 1; they are coprime.
15
8 does not belongSequence is to add 1 for the first number, and double the next result, and then add 1 to that result, and double again...Correct Sequence2 (+1) 3 (x2) 6 (+1) 7 (x2) 14 (+1) 15 (x2) 302-3-6-7-8-14-15-30(2+1) = (3 x 2) = (6 + 1) = (7 x 2) = (14 + 1) = (15 x 2) = 30 ....So 8 does not belong in the above series.
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8
31 because 3+4=7+4=11+4=15+4 does not equal 31
The 8 does not belong. The sequence of numbers alternates adding 1 to the previous number and doubling the previous number. 2 3 = 2 + 1 (adds 1 to previous number) 6 = 3 x 2 (doubles previous number) 7 = 6 + 1 (adds 1 to previous number) 14 = 7 x 2 (doubles previous number) 15 = 14 + 1 (adds 1 to previous number) 30 = 15 x 2 (doubles previous number)
1, because all the numbers are factors of 5.* * * * *Or 5: it is the only prime number.Or 15: it is the only number that is not a factor of 100Or 25: it is the only number with three factorsOr 100: it is the only number with 9 factors
13, it's the only prime. All the other ones can be divided by something other than 1.
It does not, the mass number of nitrogen is 14 not 15.
The two number have no common prime factors. i.e. the HCF(14, 15) = 1; they are coprime.
15
13
8 does not belongSequence is to add 1 for the first number, and double the next result, and then add 1 to that result, and double again...Correct Sequence2 (+1) 3 (x2) 6 (+1) 7 (x2) 14 (+1) 15 (x2) 302-3-6-7-8-14-15-30(2+1) = (3 x 2) = (6 + 1) = (7 x 2) = (14 + 1) = (15 x 2) = 30 ....So 8 does not belong in the above series.
There are infinitely many numbers between 14 and 15. Just type "14." then continue typing any arbitrary digits (except all zeroes, or all nines), and you have a number between 14 and 15.There are infinitely many numbers between 14 and 15. Just type "14." then continue typing any arbitrary digits (except all zeroes, or all nines), and you have a number between 14 and 15.There are infinitely many numbers between 14 and 15. Just type "14." then continue typing any arbitrary digits (except all zeroes, or all nines), and you have a number between 14 and 15.There are infinitely many numbers between 14 and 15. Just type "14." then continue typing any arbitrary digits (except all zeroes, or all nines), and you have a number between 14 and 15.
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