Can you make four (4) nines (9) equal 100?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

When 99 is considered higher than 100?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

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?

Find the next number in the sequence

5 12 24 36 ?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?