What is more useful when it is broken?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?