Find the next number in the sequence

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

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Find the number of squares in the below-given picture.

What word begins and ends with an E, but has only one letter?

Give it food and it will live; give it water and it will die.

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

why number 8549176320 is one of a kind?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Which is faster, Heat or Cold ? Explain.