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

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

Can you solve this picture maths equation?

What does below Rebus mean ?

esgg sgeg gegs gsge

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

Complete the table series riddle by finding the number that can replace "??".

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?