Find the odd one out from the given options.
15
15 is correct.
All four numbers are odd, so odd and even cannot separate them; the useful test is the factors of each number.
19, 13 and 17 have no factors other than 1 and the number itself, so all three are prime numbers.
\(15 = 3 \times 5\), so 15 is a composite number and is the only one that does not belong to the group of primes.
Similar Questions
If '+' means 'x', '-' means '÷', 'x' means '+' and '÷' means '-', then 7 + 7 + 7 - 7 x 7 ÷ 7 = ?
Important Questions from Number Based
In the following question, four number pairs are given. The number on left side of (-) is related to the number of the right side of (-) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.
Select the set in which the numbers are related in the same way as are the number of the following set.
(3, 7, 58)
Find the odd number/letters from the given alternatives.
Find the odd number/letters from the given alternatives.
Identify the number which is different from the other.
