Prove that twice of ten is the same as twice of eleven.

Five lovely ladies(Sophia, Isabella, Madison, Emma and Olivia) planned a picnic.

They each buy one thing each for the picnic.

Sophia, Emma and Olivia got a drink : orange-Juice, apple-juice, and mango-juice.
Olivia got the drink with the same letter as the one in her first name.
Emma loves mango-juice.
The other two bring some food : chocolates and pizza.
Also Madison is allergic to cheese.

So which ladies bought what ?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

The centre of the third figure is empty. What digit should fit inside?

Which English verb becomes past tense just by rearranging the letters?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?