Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Count the Triangle in the figure given below:

Which tank will fill first?

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

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

A man escapes from jail using help from his girlfriend. The investigators suspect four girls of being the man's girlfriend.

Out of those four girls, one is his girlfriend who is lying. Two of the girls are completely innocent and are speaking the truth. One of the girls is the man's sister who is helping the girlfriend lie. Following are the statements from all four of them:

Ariana: "Myrna is his girlfriend."
Jane: "Angelina is lying."
Angelina: "Ariana is lying."
Myrna: "Jane is not his sister."

Can you find out who is the man's sister among them?

People put me on the table and cut me but do not eat me. What am I?

Which is faster, Heat or Cold ? Explain.

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?