DAY 104

Today’s Challenge

Here’s a selection of mental arithmetic questions.  Can you get all seven correct?

  1. (10 + 10) – (15 – 3) = ?
  2. What is the sum of 0.83 and 0.89?
  3. What is 1 × 9?
  4. If Ben earns £10 every half-hour, how much will he earn in 40 hours?
  5. If you burn 100 calories by climbing 100 stairs, how many calories do you burn when climbing 50 stairs?
  6. What is 5456 – 4372?
  7. Twice my age plus 4 more is 72. How old am I?

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 2nd & 5th rows of the playing board contain the following fourteen numbers:

6     7     8     16     17     21     28     48     50     55     63     64     81     84

What is the product of the two prime numbers?

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Answers

. . . can be found when clicking this.

7puzzleblog

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