Name a key which is hardest to turn.

What is the largest number you can write with just 3 digits?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag. Randomly remove two balls from the bag. * If they are of different colors, put the blue one back in the bag. * If they are the same colour, take them out and put a red ball back in the bag. Repeat this until only one ball remains in the bag. What is the color of the sole ball left in the bag ?

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

Find the smallest sentence with all the English alphabet.

Can you quickly find which two matchstick figures are identical?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Which five letter word can be added at the end of below word to form a
valid word?

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Can you find the odd number in the following?

2716, 4135, 5321 and 7145