_ + _ = _ _ + _ = _ _ + _ = _ _ + _ = _
Fill the blanks with numbers above, so: * The 4 additions are right. * All numbers must be used. * If we turn the additions upside down, they are still right. * You can rotate any numbers too, example 1091 -> 1601.
158 + 1998 = 2156 851 + 8661 = 9512 (flipped)
1601 + 1051 = 2652 1091 + 1501 = 2592 (flipped)
1011 + 1811 = 2822 1101 + 1181 = 2282 (flipped)
1081 + 1901 = 2982 1801 + 1061 = 2862 (flipped)
What 4 latter word can be written forward, backward or upside down, and can still be read from left to right
In the attached picture, you will find a pyramid formation, that is made up of ten circles. If you can move only 3 circles, can you turn it upside down?We have numbered the coins so that you can comment the numbers as answers.
How many ways can we arrange the numbers 1 through 9 in a 3x3 grid such that the following conditions hold? - Every number is greater than the number directly above it. - Every number is greater than the number immediately to the left of it.
Move four sticks to turn the tower upside down. The form and the structure of the tower should not change...