Solve the alphametic puzzle by replacing the alphabet with the number.

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John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

Can you solve the below tricky visual equation?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

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