Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

Our product and our sum always give the same answer. Who are we?

Why is the Hole below a Lock?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Solve the following series:
AZ, GT, MN, __, YB