For the following questions answer them individually
Mark the true statement:
i) There are only two primes that are consecutive positive integers.
ii) For every positive primes, there is a corresponding negative prime.
iii) Sum of two primes is always even
iv) Coprime numbers are always prime numbers.
Three persons have their ages in the ratio 4 : 7 : 9. Eight years back their total age was 56.How old is the eldest now?
If 'Sky' is called 'Sea', 'Sea' is called 'Water', 'Water' is called 'Air', 'Air' is called 'Cloud' and'Cloud' is called 'River', then what do we drink when thirsty?
Mark the right statement:
(i) Coprime numbers must be both prime always.
(ii) Of two coprime numbers one is prime and the other is composite always.
(iii) Coprime numbers are twin primes.
(iv) Two consecutive integers are always coprime.
Fix the symbols +, -, x, ÷ appropriately in the box to fit the equation given here.
5 â–¡ 1 â–¡ 3 â–¡ 5 = 20
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