Question

Express 49 as the sum of first seven odd natural numbers.
Write the perfect square numbers from 1 to 100.
Write a pythagorean triplet whose smallest number is 14.
Write a pythagorean triplet whose greatest number is 257.
Verify whether 1024 is a perfect square or not.
Verify 6 and 496 are perfect numbers or not.
Verify 191 and 193 are twin primes or not.
Explain the following are composite numbers are not
i) 7 x 11 x 13 + 13 ii) (17 x 11 x 2) + ( 7 x 11 x 5)
Write all posssible prime factors of 156.​

Answer 1

Answer:

As the sum of first odd natural numbers is n

2

and 49=(7)

2

..49 is the sum of first 7 odd natural numbers.

49=1+3+5+7+9+11+13