131. What number comes next in the following sequence?

2, 6, 6, 12, 10, 18, 14, 24, ?

18. Starting from 1, alternately multiply each consecutive integer by 2 or 3. Which means the integers 1, 2, 3, 4, 5, 6, 7, 8, 9 become 2, 6, 6, 12, 10, 18, 14, 24, 18.

132. The impetuous young man was telling his fiancée what time he would be
at her house so they could elope. He wanted to arrive at midnight, so he had done a few practice runs. If he drove 40 miles per hour, he'd be an
hour early. If he drove at 30 miles per hour, he'd be on time, but at 20 miles per hour, he'd be two hours late. How far away was he?

133. Insert + or - between the numbers to make the equation work:

8 7 6 5 4 3 2 1 = 68

If you don't place a symbol between numbers, they merge to form a multi-digit number.

8 7 - 6 5 + 4 3 + 2 + 1 = 68.

134. Five kids entered a contest to guess how many jelly beans were in a
jar. Alice guessed 45, Betty guessed 39, Charlie guess 49, Don guessed 50 and Earl guessed 47. One of them was off by 6, one by 5, one by 2, and one
by 4. One was right. How many marbles were in the jar?

135. What is the 4-digit number (no zeros) in which the first digit is one-eighth
of the last digit, the second digit is the sum of the first and last digits and the third digit is twice the first? This is too easy, try to do it in your head!

136. In a duty free store, Jack bought a suit for $200. This included a 10%
tax for stain protection, and a 10% tax for service charge to exchange his dollars into pesos and a 5% tip for the salesman. ( the extra charges were based
on the original price. ) How much would the suit have cost without all the extras.

$160.00. ( the original price plus 25% of the original price added, would total $200. ).

137. Mary is a champion weightlifter. If she weighs 120 pounds plus a third of her own weight, how much does she weigh?

180 pounds. The equation is x = 120 + x/3.

138. Write the number 76 using three consecutive numbers between 1 and 9
inclusive, using each number once only. You may use any of the mathematical operational signs: +, -, x and ÷.

139. There are 3 cups and 10 coins on the table. You are asked to distribute the coins in the 3 cups according to the
following 2 conditions: a: there must be no empty cups; b: there must be 7 coins in one cup and 3 in another.

Put 1 coin into the 1st cup, 2 coins into the 2nd cup and 7 coins into the 3rd cup. Then place the 1st cup into the 2nd cup.

140. What is the lowest common denominator of:

1/10, 1/9, 1/8, 1/7,
1/6, 1/5, 1/4, 1/3, 1/2