Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

What does this below rebus puzzle mean?

Can you solve below mathematical equation?

2^1234 - 2^1233

What work can one never finish?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

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

which number am I?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?