Why is it very easy to weigh a fish?

what does the below math rebus puzzle mean?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

Find the next number in the series below

21 32 54 87 131 ?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?