What occurs twice in a week, once in a year but never in a day?

Which five letter word can be added at the end of below word to form a
valid word?

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What is the largest number you can write with just 3 digits?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

What number comes next in this sequence:
7 8 5 5 3 4 4 _

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

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?

In a town, there are over 100 flats.
Flat-1 is named first flat.
Flat-2 is named second flat.
Flat-3 is named third flat.

A visitors 'Victor' decides to walk through all the flats, he finds all the flats except flat-62.
Victor later founds that the local of the town have given it another name.

What is the name of the Flat?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

How can you write nineteen in a manner that if we take out one, it becomes twenty?