Yyou could do (2x2)! (=24) then / 2 (= 12) then - 2/2 (= 11)
(where ! means factorial, so 4! means 4x3x2x1, = 24)
Is that allowed?
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Yes, you can make 11 using only four 2s by using the following mathematical expression: (2 + 2) x (2 + 2) = 4 x 4 = 16. Then, subtract (2/2) to get 16 - 1 = 15. Finally, take the square root of 15 to get √15 ≈ 3.87, which is close to 4. Therefore, using four 2s, you can approximate 11 by following these steps.
(2x2x2)/2 + 2
2s + 16 = 4s - 6 Subtract 2s from both sides: 16 = 2s - 6 Add 6 to both sides: 22 = 2s divide both sides by 2: s = 11
Yes
42 can be divided by 2 once. The result, 21, is not divisible by 2.