40 challenges · arithmetic lab
Repeated digits: five 5s and six 6s
Use the same digit exactly five or six times. Combine operations, parentheses and, if you wish, joined digits to reach the target.
Read the article and strategies →Use +, −, ×, ÷, parentheses and joined digits. Each written digit counts once; 55 counts as two 5s. Powers, roots and decimal numbers are not allowed.