Читать книгу The Ultimate Mathematical Challenge: Over 365 puzzles to test your wits and excite your mind - Литагент HarperCollins USD, F. M. L. Thompson - Страница 16

Make a Number Challenge

In each case you are given some numbers and are challenged to use them to make the target number.

You can use the basic mathematical operations + − × ÷ and brackets, but no other mathematical symbols.

You can use each of the given numbers just once, but you don’t have to use all the numbers. You can’t put digits together to make larger numbers and you can’t use exponents.

Example: Use 1, 2, 3 and 8 to make 27.

Answer: (1 + 8) × 3 and 8 × 3 + 1 + 2 are both correct. However, 81 ÷ 3 and 3¹⁺² are not acceptable answers.

The following challenges are taken from the Primary Team Maths Resources for 2015.

Question 1

Use 1, 4, 4, 6, 6 and 75 to make 324.

Question 2

Use 1, 2, 4, 6, 7 and 50 to make 405.

Question 3

Use 1, 2, 3, 3, 6 and 100 to make 154.

Question 4

Use 1, 4, 5, 8, 9 and 75 to make 760.

Question 5

Use 5, 6, 8, 8, 9 and 25 to make 426.

Question 6

Use 1, 2, 4, 6, 7 and 75 to make 441.

Question 7

Use 1, 2, 3, 5, 7 and 25 to make 851.

Question 8

Use 2, 4, 5, 7, 8 and 25 to make 594.

Question 9

Use 1, 2, 6, 7, 8 and 25 to make 483.

Question 10

Use 1, 5, 6, 6, 7 and 100 to make 521.

[SOLUTION]