Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

Give it food and it will live; give it water and it will die.

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.

Count the number of triangles in the given picture.

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?