Can anyone tell me a word in the English dictionary which has a silent 'z'?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

You need to remove two matchsticks to make the below equation true. Can you do it ?

What type of tree can I carry in my hand?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

I taste better than I can smell. Who am I?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Count the Triangle in the figure given below:

I’m orange, I wear a green hat and I sound like a parrot. What am I?