Why did the Girl throw the butter out of the window?

Remove two matchsticks to make the below equation correct.

There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one goes and lights up every bulb. The second one goes and switches off all the even-numbered bulbs - second, fourth, sixth... and so on. The third one goes and reverses the current position of every third bulb (third, sixth, ninth? and so on.) i.e. if the bulb is lit, he switches it off and if the bulb is off, he switches it on. All the 100 strangers progress similarly.

After the last person has done what he wanted, which bulbs will be lit and which ones will be switched off?

When it's bad luck to meet a black cat?

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

What English word has three consecutive double letters?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?