I have branches, but no fruit, trunk or leaves. What am I?

What Deficiency does the below rebus represent?

VIT_MIN

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Can you write down eight eights so that they add up to one thousand?

Which is the rope you never skip with?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?