Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

I always drive my customer away.

Who am I?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

Name a key which is hardest to turn.

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?