Circle the figure that comes next in the pattern above. The five figures at the bottom are numbered 1 to 5: the first row from left to right is 1, 2, 3 and the second row is 4, 5.
The figure shows a pattern: each number is connected to the next by an arrow that goes down, then right, then up-right, and repeats (0 down to 1, right to 2, up to 3, then down to 4, ...). Which of the arrows below shows correctly how 30 is connected to 31? Choose the number of the correct box (1 to 4, from left to right).
Anne chooses a number. She adds 6 and then multiplies the sum by 4. She then subtracts 8 from the product. If the new number is 28, what number did Anne choose?
Study the first two figures. Then find the missing number in the last figure. The numbers are: first cross 2, 1, 3, 4, 10; second cross 6, 2, 9, 2, 19; third cross 3, 5, ?, 7, 28.
A frog falls to the bottom of a 200-cm well. It leaps up 30 cm each day and slides down 20 cm each night. How many days will it take for the frog to leap out from the well?