How many prime numbers are there in the list 1, 12, 123, 1234, 12 345, 123 456 ?

It is important to remember that we do not regard 1 as a prime number. We see that 12, 1234 and 123 456 are not prime numbers because they are divisible by 2. Also, 123 is not a prime number because it is divisible by 3, and 12 345 is not a prime number because it is divisible by 5. So there are no prime numbers in the list.

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Rajan is the brother of Sachin and Manick is the father of Rajan. Jagat is the brother of Priya is the daughter of Sachin. Who is the uncle of jagat?

Jagat is the brother of Priya and Priya is the daughter of Sachin. Jagat is the son of Sachin . Now , Rajan is the brother of Sachin.

Thus, Rajan is the uncle of jagat.

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In following alphabet series , one term missing as shown by question mark . Choose missing term from options.

ejo, tyd, ins, xch, ?

There is a gap of four letters between the first and second, the second and third letters of each term, and also between the last letter of a term and the first letter of the next term.

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Find the wrong number in the series:

3, 8, 15, 24, 34, 48, 631

3, 8, 15, 24, 34, 48, 631

The difference between consecutive terms of the given series are respectively 5, 7, 9, 11 and 13.Clearly, 34 is a wrong number and must be replaced by (24 + 11) i.e. 35.

Hence, the answer is (C)..