Other examples include understanding the size of numbers in relation to one another, finding missing numbers in a sequence, understanding that written numbers like “100” represent 100 items, and ...

The missing number is 1,620. The digits in the tens places (green in the figure below) of the numbers in columns 1, 2, 4 and 5 are added together. The total value is represented by the digits in ...

Listen to and think about a story. Find the missing number in a number set.

Identify vowel sounds, read and write sight words, find the missing number in a set.

A challenging arithmetic puzzle, presented as an image, tests readers' cognitive abilities. The puzzle involves finding a missing number in a sequence within seven seconds, assessing IQ and ...

(Holly Korbey for The Hechinger Report) Other examples include understanding the size of numbers in relation to one another, finding missing numbers in a sequence, understanding that written numbers ...