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

Why is the Hole below a Lock?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What's a single-digit number with no value?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you solve the below tricky visual equation?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?