There are two rows of numbers in the grid below. The upper row is complete, and in the lower row one number is missing. Find the number that keeps the same pattern as the upper row.
Show Hint
Try multiplying the outer numbers and see how that connects to the middle number.
We can check this by testing each option against the doubled product link shown in the upper row, without restating the rule first.
Option A (220): Half of 220 is 110, and 110 is not the product of 15 and 16, so this does not fit.
Option B (480): Half of 480 is 240, and 15 multiplied by 16 is exactly 240, so this matches the same doubled product link that connects 12, 14 and 336 in the upper row.
Option C (125): Half of 125 is not a whole number, so it cannot come from doubling a product of two whole numbers.
Option D (450): Half of 450 is 225, which is not the product of 15 and 16, so this fails the check too.
Only 480 gives a clean match when halved and compared with the product of 15 and 16.
Let's summarize:
Test the reverse operation (halving) on each option to quickly confirm which one fits a doubled product grid rule.
