I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Take one out and scratch my head, I am now black but once was red. What am I?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Find the next number in the series below

21 32 54 87 131 ?

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