Number puzzles - Section 1
Practice and master this topic with our carefully crafted questions.
Reading each column as a 3 digit number, moving from left to right, the columns follow the sequence of cube numbers of 5, 6 and 7.
Working from top to bottom, and reading each row as a 3 digit number, rows are arranged in order of the Square Numbers, from 11 to 15, with the digits reversed in each case.
Work through the diagram in horizontal rows. The sum of the numbers in each row is always 23.
Working through the diagram in rows, find the difference between the left and right hand values, then add 2 to give the value in the central space.
In each star, the number in the centre equals the difference between the sum of the even numbers and the sum of the odd numbers around the points of the star.
In each triangle, the central value equals the average of the 3 values around the outside.
Working in rows, the number in the central oval equals the sum of the left and right hand numbers, divided by 3.
Start with 1 and move clockwise. Multiply the previous number by 2 and add 4 to give the next number around.
Working in columns, divide the top value by 2 to give the middle value, and multiply this by 3 to give the bottom value.
Start with the top left circle, and move around the others in a W shape. The sum of the numbers in each circle follows the sequence of 10, 12, 14, 16 and 18.