Answer: Option A Explanation:Starting with the 10 at the top, one set of numbers increases by 3 each time, written in alternate boxes as
you move down the diagram, and the other set of numbers decreases by 2, written in the boxes remaining.
Answer: Option C Explanation:On each row, add the values of the left hand and central boxes to give the value in the right hand box.
Answer: Option D Explanation:In each star diagram, the number in the centre equals the sum of the top three numbers,
subtracting the sum of the bottom two numbers.
Answer: Option B Explanation:Starting top left, and moving down in columns from left to right, the numbers follow the sequence of
prime numbers from 2 to 23.
Answer: Option A Explanation:Numbers in the segments of the left hand circle equal the difference between numbers in corresponding
segments of the two right hand circles.