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

Replace the question mark with the correct number below.

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

I cannot talk, but I always reply when spoken to. What am I?

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

The more of this there is, the less you see. What is it?

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.