Question
12 children and 18 men complete an artwork in 9 days.
Each child takes twice as long as a man to finish the artwork. How many days will it take for 18 men to complete the same artwork?Solution
From the question, Capacity of 2 children = Capacity of 1 man. Let 18 men take x days to complete the artwork. M βDβ = M2 D2 (12 children + 18 men) Γ 9 = 18 Γ x (6 men + 18 men) Γ 9 = 18 Γ x 24x9 =18x 24x9 = 18x x= 12 days
Evaluate:
β729 + β49 - β16 + 1/β64
Simplify:

(1/5)(40% of 800 β 120) = ? Γ 5
2/5 of 3/4 of 7/9 of 7200 = ?
`sqrt(5476)` + 40% of 1640 = ? `xx` 4 - 2020
? = (22% of 25% of 60% of 3000) + 21
Determine the simplified value of the given mathematical expression.
(342 β 20% of 5280) = ? Γ· 3
β157464 =?