There are 100 seats in a row. What is the least number of seats that must be occupied so that the next person to be seated must sit next to someone?

How many 3’s are shown altogether in the whole numbers between 100 and 500?

I’m thinking of a number.

If I multiply it by 4 and then subtract 4, I get the same answer as I would if I multiplied it by 3 and added 11.

Which whole number less than 48 has the greatest number of factors?

I think of a number, multiply it by five and take three. I multiply this number by 6 and this gives a result of 252. What was the number?

How many zeros are there at the end of the following product?

If you are to randomly select one unseen marble from one of the following bags, from which bag should you select in order to give you the best chance of getting a red marble?

Select one:

What number comes next?  2,  2,  2,  4,  4,  8,  8,  6,  14,  16,  8,  __