What number should replace the question mark? Left array: top row 4 1 7 2, bottom row 1 6 0 3. Right array: top row 9 5 6 8, bottom row 7 5 4 ? Answer with a natural number.
What number should replace the question marks? Left array (top to bottom): 3471, 5005, 1534, 9221, 7687. Right array (top to bottom): ????, 7486, 2589, 4782, 2193. Answer with a natural number.
Each number in a pyramid is the sum of the two numbers immediately below it. The rows from the top are: 1 number (?); 2 numbers (?, 41); 3 numbers (37, ?, 19); 4 numbers (?, ?, ?, 11); 5 numbers (?, ?, 6, ?, ?). What number is at the top? Answer with a natural number.
What number should replace the question mark? The grid has three rows: 4 4 2 2 5 2; 2 1 4 3 1 3; ? 6 0 4 3 4. Each group of four numbers around a dot totals the same. Answer with a natural number.
Which letter is missing? In the wheel, each letter in the inner ring sits across from a number in the outer ring. Answer with a single capital letter (English alphabet A-Z).
What number should replace the question mark? Each group has two top numbers, two bottom numbers and a middle number: top 4, 3 / bottom 9, 6 with 2; top 8, 11 / bottom 13, 9 with 3; top 5, 9 / bottom 1, 14 with ?. Answer with a natural number.
The link between the three numbers in each line is the same. The lines are: ?, 63, 27; 48, ?, 36; 29, 92, ?. What is the missing number in the third line? Answer with a natural number.
What number should replace the question mark? Each group has a number on top, a number below it, and two numbers at the bottom: top 17, below 41, bottom 6 and 4; top 18, below 45, bottom 3 and 9; top 35, below ?, bottom 7 and 8. Answer with a natural number.