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Arithmetic Puzzles Created by Inna Shapiro ©2008
Problem 1 Please, replace the # and & symbols with digits # # + # & 1 9 7
Problem 2 Please, replace the # and & symbols with digits 1 # # # - & & & 1
Problem 3 Please, replace each letter with a digit: aa + bcb = deed, Note that each of those numbers is its own mirror image (left to right is same as right to left).
Answer We must find digits, so that the sum looks like aa + bcb = deed. Obviously d=1 and b=9 => aa + 9c9 = 1ee1, that means that a=2, c9 = 1ee1 => e=0 and c= = 1001
Problem 4 Please, replace letters with digits B D C E + B D A E A E C B E
Problem 5 Please, replace letters with digits a 5 2 b - b 2 5 a 8 c d c
Problem 6 How can you replace # and & symbols? 1.#### + 1 = 1&&&& 2.1&&&&&& - 1 = ######
Answers = – 1 =
Problem 7 Can you change letters a and b to digits? b a a a a + a a a a a a a a b a a a a
Problem 8 Please, replace letters with digits to get the correct answer 7abcdef : 5 = abcdef7
Answer : 5 =
Problem 9 Max wrote two-digit number. Then he inserted 0 between the two digits. The result is nine times greater than original number. What was the original number?
Answer The original number is 45, when Max added 0 he got 405, 45 * 9 = 405
Problem 10 Please add arithmetic signs and parenthesis to get correct answers: = = = = = 7
Answer ( ) : 5 = 3 (5 * 5 – 5) : 5 = 4 (5 – 5) * = 5 (5 * 5 + 5) : 5 = 6 (5 + 5) : = 7
Even Numbers Created by Inna Shapiro ©2008 Problem 1 The sum of two integers is even. What is true about the product of those two integers? Is it even.
Fun Arithmetic Created by Inna Shapiro ©2008 Problem 1 Max has ten cards with the digits 0, 1, 2,…9. He can arrange these cards into different 10-digit.
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