What is so fragile that saying its name breaks it?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

Using Only Five 5's and any mathematical operator make sum as 37

When 99 is considered higher than 100?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?