Find the next number in the sequence

1, 2, 6, 21, 88, __?

What goes up but never comes down?

Can you count the number of lines in the below picture?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Be active and find the killer in the picture Riddle below.

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Name a key which is hardest to turn.

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?)

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