How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

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

Rose, Lily and Jasmine decided to buy flowers for their moms on Mother's Day. One of them bought lilies, the other roses, and the third one jasmines.
'It's funny!' said the girl with roses, 'we bought roses, jasmines and lilies, but none of us bought the flowers matching her name'.
'You're right!', said Lily.
What kind of flowers did each of the girls buy?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Solve the puzzle by telling what does below picture means.

I have eight fingers and two thumbs but I do not live. What Am I?