DAY 379

The sun is 93,000,000 miles from earth. Light travels at a speed of 186,000 miles per second. How long does it take light from the sun to reach the earth?

Answer:

8 minutes 20 seconds ........ 93,000,000 divided by 186,000 is (exactly) 500. 500 seconds divided by 60 = 8.33333333 or 8 1/3 minutes.

DAY 378

Think of a proper fraction in which both the numerator and denominator are prime numbers. If you subtract 19 from the product of the numerator and denominator, the answer is 16. What is the fraction?

Answer:

5/7 ........... Let a/b represent the fraction. (a X b) - 19 = 16. a X b = 35.

DAY 377

Fred says to Jack: "I'll bet you $1 that if you give me $2, I'll give you back $3. Should Jack take the bet?

Answer:

No........... If Jack takes the bet, he gives Fred $2. Fred can then say, "You win. I lose the bet." He then gives Jack $1 - the mount of the bet - but keeps Jack's other dollar.